State v. Hall
Opinions
[9] CARSON, C. J.
In this criminal case, we decide two questions. First, under the circumstances at issue here, did the police encounter with defendant constitute an unlawful “stop” under ORS 131.615(1) (1995) and, consequently, also an unlawful “seizure” under Article I, section 9, of the Oregon Constitution?1 Second, if so, did that unlawful stop vitiate defendant’s consent to the subsequent search of his person?
The state charged defendant with possession of amphetamine, ORS 475.992(4)(b), based upon evidence that a police officer had seized during a consent search of defendant’s person. The trial court denied defendant’s pretrial motion to suppress the state’s evidence, and a jury later convicted defendant of the charged offense. On defendant’s subsequent appeal, a majority of the Court of Appeals, sitting en banc, reversed. It held that, notwithstanding the voluntariness of defendant’s consent to the search, Article I, section 9, required exclusion of the challenged evidence because the police officer had stopped defendant unlawfully and then had “exploited” that unlawful stop to obtain defendant’s consent. State v. Hall, 183 Or App 48, 50 P3d 1258 (2002). We allowed the state’s petition for review. For the reasons that follow, we affirm the decision of the Court of Appeals and reverse the judgment of the trial court.
[10] I. FACTS AND PROCEDURAL BACKGROUND
Our review of the trial court’s denial of defendant’s pretrial suppression motion is limited to issues of law. We are bound by the trial court’s findings of historical fact if constitutionally sufficient evidence in the record supports those findings. State v. Boone, 327 Or 307, 309, 959 P2d 76 (1998). If the trial court did not make express findings respecting all pertinent historical facts, and the record contains conflicting evidence, then we presume that the trial court found facts that were consistent with its ultimate conclusion. State v. Stevens, 311 Or 119, 126-27, 806 P2d 92 (1991). With those precepts in mind, we take the following facts from the trial court’s written findings and from the record.
At approximately 4:00 p.m. on January 8, 1997, Klamath Falls Police Officer Deese saw defendant walking along Washington Street near Tenth Street in Klamath Falls. Deese was in uniform and was driving a marked police vehicle. As Deese drove past defendant, he noticed defendant twice glance towards him and then quickly look away. After he had passed defendant, Deese observed in his rear-view mirror that defendant had turned around to look at him several more times.
Based upon those observations, Deese turned his vehicle around and drove back towards defendant. Without activating his overhead lights or blocking defendant’s way, Deese stopped his vehicle next to defendant and then motioned with two fingers for defendant to approach him. When defendant neared, Deese got out of his vehicle and asked defendant if he had any personal identification. Defendant handed Deese an identification card, which Deese used to radio the police dispatch for a warrant check relating to defendant.
After he had radioed the police dispatch, but before he had received back any information, Deese returned the identification card to defendant. Deese noticed that defendant appeared to be carrying something inside his jacket and asked defendant if he was carrying any weapons, knives, or illegal drugs. Defendant replied that he was not. Deese asked defendant if he minded if Deese searched him, and defendant [11] responded “no, go ahead.” After patting down the exterior of defendant’s jacket, Deese reached into defendant’s jacket pocket, pulled out a small glass vial, and opened it. Based upon the smell and the appearance of white residue inside that vial, Deese concluded that the vial contained methamphetamine, and he arrested defendant for possession of a controlled substance. Subsequent testing established that the vial contained traces of amphetamine.
Before trial, relying upon ORS 131.615(1) (1995), Article I, section 9, and the Fourth Amendment to the United States Constitution,2 defendant moved to suppress the evidence of the vial and its contents upon the ground that that evidence was the fruit of an unlawful police stop.3 He also contended that suppression was required because he had not consented to the search voluntarily. After a hearing at which both Deese and defendant testified, the trial court denied defendant’s motion, concluding that Deese’s encounter with defendant had not amounted to a stop and that defendant’s consent to the subsequent search had been voluntary.4 As [12] noted, after a trial, a jury found defendant guilty of the charged offense.
Defendant appealed. Before the Court of Appeals, defendant did not challenge the trial court’s ruling that his consent to the search had been voluntary. Instead, he argued only that the state’s evidence was inadmissible because it had derived from an unlawful police stop.5
Sitting en banc, a majority of the Court of Appeals reversed. Contrary to the trial court, the Court of Appeals unanimously concluded that Deese unlawfully had stopped defendant without reasonable suspicion of criminal activity. Hall, 183 Or App at 56, 62. In considering the effect of that illegality upon the admissibility of the evidence from the consent search that followed, that court also unanimously agreed that, notwithstanding the voluntariness of defendant’s consent, Article I, section 9, required the court to exclude the state’s evidence if that evidence had derived from “exploitation” of the unlawful stop. Id. at 58, 63. In deciding whether the state’s evidence in fact had derived from “exploitation” of that prior illegality, however, the court divided over both the applicable analysis and the result.
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[9] CARSON, C. J.
In this criminal case, we decide two questions. First, under the circumstances at issue here, did the police encounter with defendant constitute an unlawful “stop” under ORS 131.615(1) (1995) and, consequently, also an unlawful “seizure” under Article I, section 9, of the Oregon Constitution?1 Second, if so, did that unlawful stop vitiate defendant’s consent to the subsequent search of his person?
The state charged defendant with possession of amphetamine, ORS 475.992(4)(b), based upon evidence that a police officer had seized during a consent search of defendant’s person. The trial court denied defendant’s pretrial motion to suppress the state’s evidence, and a jury later convicted defendant of the charged offense. On defendant’s subsequent appeal, a majority of the Court of Appeals, sitting en banc, reversed. It held that, notwithstanding the voluntariness of defendant’s consent to the search, Article I, section 9, required exclusion of the challenged evidence because the police officer had stopped defendant unlawfully and then had “exploited” that unlawful stop to obtain defendant’s consent. State v. Hall, 183 Or App 48, 50 P3d 1258 (2002). We allowed the state’s petition for review. For the reasons that follow, we affirm the decision of the Court of Appeals and reverse the judgment of the trial court.
[10] I. FACTS AND PROCEDURAL BACKGROUND
Our review of the trial court’s denial of defendant’s pretrial suppression motion is limited to issues of law. We are bound by the trial court’s findings of historical fact if constitutionally sufficient evidence in the record supports those findings. State v. Boone, 327 Or 307, 309, 959 P2d 76 (1998). If the trial court did not make express findings respecting all pertinent historical facts, and the record contains conflicting evidence, then we presume that the trial court found facts that were consistent with its ultimate conclusion. State v. Stevens, 311 Or 119, 126-27, 806 P2d 92 (1991). With those precepts in mind, we take the following facts from the trial court’s written findings and from the record.
At approximately 4:00 p.m. on January 8, 1997, Klamath Falls Police Officer Deese saw defendant walking along Washington Street near Tenth Street in Klamath Falls. Deese was in uniform and was driving a marked police vehicle. As Deese drove past defendant, he noticed defendant twice glance towards him and then quickly look away. After he had passed defendant, Deese observed in his rear-view mirror that defendant had turned around to look at him several more times.
Based upon those observations, Deese turned his vehicle around and drove back towards defendant. Without activating his overhead lights or blocking defendant’s way, Deese stopped his vehicle next to defendant and then motioned with two fingers for defendant to approach him. When defendant neared, Deese got out of his vehicle and asked defendant if he had any personal identification. Defendant handed Deese an identification card, which Deese used to radio the police dispatch for a warrant check relating to defendant.
After he had radioed the police dispatch, but before he had received back any information, Deese returned the identification card to defendant. Deese noticed that defendant appeared to be carrying something inside his jacket and asked defendant if he was carrying any weapons, knives, or illegal drugs. Defendant replied that he was not. Deese asked defendant if he minded if Deese searched him, and defendant [11] responded “no, go ahead.” After patting down the exterior of defendant’s jacket, Deese reached into defendant’s jacket pocket, pulled out a small glass vial, and opened it. Based upon the smell and the appearance of white residue inside that vial, Deese concluded that the vial contained methamphetamine, and he arrested defendant for possession of a controlled substance. Subsequent testing established that the vial contained traces of amphetamine.
Before trial, relying upon ORS 131.615(1) (1995), Article I, section 9, and the Fourth Amendment to the United States Constitution,2 defendant moved to suppress the evidence of the vial and its contents upon the ground that that evidence was the fruit of an unlawful police stop.3 He also contended that suppression was required because he had not consented to the search voluntarily. After a hearing at which both Deese and defendant testified, the trial court denied defendant’s motion, concluding that Deese’s encounter with defendant had not amounted to a stop and that defendant’s consent to the subsequent search had been voluntary.4 As [12] noted, after a trial, a jury found defendant guilty of the charged offense.
Defendant appealed. Before the Court of Appeals, defendant did not challenge the trial court’s ruling that his consent to the search had been voluntary. Instead, he argued only that the state’s evidence was inadmissible because it had derived from an unlawful police stop.5
Sitting en banc, a majority of the Court of Appeals reversed. Contrary to the trial court, the Court of Appeals unanimously concluded that Deese unlawfully had stopped defendant without reasonable suspicion of criminal activity. Hall, 183 Or App at 56, 62. In considering the effect of that illegality upon the admissibility of the evidence from the consent search that followed, that court also unanimously agreed that, notwithstanding the voluntariness of defendant’s consent, Article I, section 9, required the court to exclude the state’s evidence if that evidence had derived from “exploitation” of the unlawful stop. Id. at 58, 63. In deciding whether the state’s evidence in fact had derived from “exploitation” of that prior illegality, however, the court divided over both the applicable analysis and the result.
According to the majority opinion, whether evidence from a consent search derives from exploitation of prior unlawful police conduct6 depends upon whether the police gained information from that illegality that provided the impetus for the police to seek the defendant’s consent. Id. at 58 n 8, 59. Specifically, reaffirming the test articulated in [13] that court’s decision in State v. Stanley, 139 Or App 526, 912 P2d 948 (1996), rev’d on other grounds, 325 Or 239, 935 P2d 1202 (1997), the majority opinion explained that “exploitation occurs when unlawful police conduct reveals information that focuses police attention on the defendant and prompts [the police] either to seek the defendant’s consent or to ask questions leading to consent.” Hall, 183 Or App at 60 (quoting Stanley, 139 Or App at 535; internal quotation marks omitted). In this case, the majority opinion determined that Deese had “exploited” the unlawful stop because that stop had allowed Deese to observe bulges in defendant’s jacket, which, in turn, had prompted his request for defendant’s consent to the search. Id. at 59. Based upon that determination, the majority opinion held that the trial court had erred by admitting the challenged evidence, and it reversed the trial court’s judgment.7 Id.
The dissent disagreed, taking issue both with the majority opinion’s explanation of the nature of the court’s inquiry in determining “exploitation” and with its application of that analysis to the facts of this case. In the dissent’s view, whether evidence derives from police exploitation of a prior illegality is a fact-specific inquiry that depends upon the nature of the causal connection between the unlawful police conduct and the evidence sought to be suppressed. Id. at 67 (Deits, C. J., dissenting). By contrast to the majority opinion’s focus upon whether the illegality affected the officer’s actions, the dissent asserted that an exploitation analysis concerns whether a prior illegality affected the defendant’s decision to consent. Id. at 72 (Deits, C. J., dissenting). Although stressing that no “bright-line” rule exists, the dissent identified a number of factors that it considered relevant to that determination, including (1) a “but-for” causal connection between the unlawful police conduct and the evidence sought to be suppressed; (2) whether the police had obtained information only by virtue of unlawful conduct, and whether [14] the defendant’s knowledge that the police had such information had been a substantial factor in the defendant’s decision to consent; (3) the presence of intervening circumstances separating the unlawful police conduct from the evidence sought to be suppressed; and (4) the temporal proximity between the unlawful police conduct and the defendant’s consent. Id. at 71 (Deits, C. J., dissenting). Because the trial court had not reached the question of exploitation in this case, the dissent would have remanded the case to the trial court for that court to determine whether the state’s evidence had derived from exploitation of the unlawful stop in light of the above-described considerations. Id. at 75 (Deits, C. J., dissenting).
The state petitioned this court for review, and we allowed that petition. On review, the state first argues that Deese’s encounter with defendant did not amount to an unlawful stop. Secondly, the state argues that, even if Deese unlawfully had stopped defendant, the challenged evidence was not subject to suppression under Article I, section 9, because defendant voluntarily had consented to the search and defendant’s voluntary act of consenting — not the unlawful stop — had been the source of the evidence from that search. In making that second argument, the state asks that we reconsider this court’s prior case law holding that a violation of a defendant’s rights under Article I, section 9, may affect the admissibility of evidence from a consent search even when the voluntariness of the defendant’s consent is not at issue. See, e.g., State v. Rodriguez, 317 Or 27, 38-42, 854 P2d 399 (1993) (explaining same).
For the reasons that follow, we conclude that Deese’s encounter with defendant constituted an unlawful stop under ORS 131.615(1) (1995) and, consequently, also an unlawful “seizure” under Article I, section 9. We further decline the state’s invitation to depart from this court’s precedents and, instead, reaffirm that a violation of a defendant’s rights under Article I, section 9, may vitiate a defendant’s otherwise voluntary consent to a search. Finally, under the facts of this case, we conclude that the state failed to satisfy its burden in showing that defendant’s consent was sufficiently independent of the preceding unlawful stop. Based upon those conclusions, we affirm the decision of the Court of Appeals and reverse the judgment of the trial court.
[15] II. DISCUSSION
As noted above, defendant’s pretrial suppression motion relied upon ORS 131.615(1) (1995), Article I, section 9, and the Fourth Amendment. Because we resolve this case on state law grounds, we do not reach defendant’s federal constitutional claim. See State v. Kennedy, 295 Or 260, 262, 666 P2d 1316 (1983) (court considers all questions of state law before reaching federal constitutional claims).
A. Applicable Oregon Law
In Oregon, both statutory and constitutional law limit the authority of police to detain citizens. ORS 131.615(1) (1995), the statutory provision at issue here, provided that a police officer temporarily may restrain, or “stop,”8 a person only when the officer “reasonably suspects that [that] person has committed a crime [.]” Article I, section 9, protects “the right of the people to be secure * * * against •unreasonable search, or seizure [.]”
Unless a defendant’s constitutional claims could result in more complete relief, this court generally begins its analysis by first considering a defendant’s statutory claims. See State v. Harberts, 331 Or 72, 81, 11 P3d 641 (2000) (so stating); see also, e.g., State v. Jacobus, 318 Or 234, 864 P2d 861 (1993) (considering whether police encounter was lawful under statutory law before considering state constitutional claims). Previously, as with constitutional limits on police authority, this court has given effect to statutes defining police authority to seize or search a person by denying the state the use of any evidence that it obtained in violation of such provisions. See State v. Davis, 295 Or 227, 236-37, 666 P2d 802 (1983) (so stating); see also, e.g., State v. Toevs, 327 Or 525, 964 P2d 1007 (1998) (suppressing evidence obtained in violation of ORS 810.410(3)(b) (1993), amended by Oregon Laws 1999, chapter 1051, section 89). Because that prior decisional law mandates such a remedy for any statutory violations in this case,9 we begin our analysis by considering [16] defendant’s statutory claim. In doing so, however, we observe that defendant does not contend that his rights under ORS 131.615(1) (1995) are different from, or greater than, his rights under Article I, section 9. This court also previously has explained that the analysis under ORS 131.615 (1995) and Article I, section 9, is substantially the same.10 See Toevs, 327 Or at 534 (so stating). Thus, we consider whether Deese’s encounter with defendant violated ORS 131.615(1) (1995) and whether exclusion of the state’s evidence is required in light of this court’s Article I, section 9, jurisprudence. See id. (following same approach).
B. Lawfulness of Police Encounter with Defendant under Oregon Law
Because defendant challenged the admissibility of the state’s evidence upon the ground that it derived from an unlawful police stop, we begin our analysis by considering the lawfulness of Deese’s encounter with defendant. This court has identified three general categories of encounters between police officers and citizens. See State v. Holmes, 311 Or 400, 407, 813 P2d 28 (1991) (so stating). The first category, “mere conversation” encounters, encompasses consensual interactions between police officers and citizens that [17] require no justification and that do not implicate Article I, section 9. Id. The second category, temporary restraints of a person’s liberty for investigatory purposes — or “stop[s]” under ORS 131.615(1) (1995) — constitutes a type of “seizure” of a person under Article I, section 9, that must be justified by a reasonable suspicion of criminal activity. Id. The third category, arrests, also constitutes a “seizure” of a person under Article I, section 9, and must be justified by probable cause to believe that the person arrested has committed a crime. Id.
As noted above, 339 Or at 11-12 n 4, the trial court concluded that Deese’s encounter with defendant had been a consensual interaction that had not restrained defendant’s liberty in a manner that implicated Article I, section 9. Although we are bound by the trial court’s findings of historical fact if constitutionally sufficient evidence in the record supports those findings, we must assess independently whether those findings support the trial court’s legal conclusion. State v. Ehly, 317 Or 66, 75, 854 P2d 421 (1993). In this case, we note at the outset that the state concedes, and we agree, that Deese’s observations of defendant repeatedly turning to look at Deese’s patrol vehicle and then averting his gaze did not give rise to a reasonable suspicion that defendant was engaged in any criminal conduct.11 Thus, if Deese’s encounter with defendant constituted a “stop” under ORS 131.615(1) (1995), then that encounter was unlawful, because it was not justified by the requisite level of concern respecting possible criminal activity. The question before us, then, is whether the trial court correctly ruled that Deese’s encounter with defendant did not amount to a stop.
In Holmes, 311 Or at 409-10, this court held that a “seizure” of a person under Article I, section 9, occurs when either (1) a police officer intentionally and significantly interferes with a person’s liberty of movement; or (2) a person believes that his or her liberty of movement has been so restricted and such a belief is objectively reasonable under the circumstances. Police conduct interfering with a person’s liberty of movement may take the form of either physical [18] force or a show of authority. State v. Juarez-Godinez, 326 Or 1, 6, 942 P2d 772 (1997). In deciding whether police conduct implicates Article I, section 9, the pivotal consideration is whether “the officer, even if making inquiries a private citizen would not, has otherwise conducted [himself or herself] in a manner that would be perceived as a nonoffensive contact if it had occurred between two ordinary citizens.” Holmes, 311 Or at 410. The determination whether a person has been “seized” under Article I, section 9, requires a fact-specific inquiry examining the totality of the circumstances in the particular case. Id. at 408.
This court’s prior case law provides useful guidance as to whether Deese’s encounter with defendant constituted a stop. In State v. Warner, 284 Or 147, 585 P2d 681 (1978), a police officer approached the defendant as he was leaving a tavern and asked the defendant if he would return inside. Id. at 150-51. The defendant complied with the officer’s request, and, once inside the tavern, the officer asked the defendant to place his identification card on a table. Id. at 151-52. After the defendant did so, the officer explained to the defendant that the officer was investigating a robbery, and he advised the defendant that “[the defendant] would be on [his] way” as soon as the officer was satisfied that the defendant had no involvement in that crime. Id. at 152. On review, this court held that, at the moment that the officer told the defendant to place his identification card on the table and advised the defendant that he was the subject of a criminal investigation, the officer had seized the defendant by a show of authority for purposes of ORS 131.615 (1975), amended by Oregon Laws 1997, chapter 866, section 1, and Article I, section 9. Id. at 165.
In State v. Painter, 296 Or 422, 676 P2d 309 (1984), a police officer approached the defendant on the street and requested to see the defendant’s identification. The defendant responded to the officer’s request by handing the officer both an expired driver license and several credit cards. While still retaining those items, the officer ran a warrant check and questioned the defendant about the location of his vehicle. Id. at 424. On review, this court held that the officer had [19] seized the defendant when the officer had retained the defendant’s identification cards because that action had the practical effect of making the defendant unable to leave. Id. at 425.
Under the facts of this case, we similarly conclude that Deese’s encounter with defendant here constituted a “stop” under ORS 131.615(1) (1995). In this case, Deese’s initial actions of stopping his vehicle next to defendant and then gesturing for defendant to approach him did not intrude upon defendant’s liberty of movement, because, even if Deese inconvenienced defendant, his actions did not constitute a show of authority involving conduct “significantly beyond that accepted in ordinary social intercourse.” Holmes, 311 Or at 410. When Deese took defendant’s identification card and radioed the police dispatch for a warrant check, however, the consensual nature of that encounter dissipated, and the encounter evolved from a “mere conversation” encounter into a restraint upon defendant’s liberty of movement. It is true that, unlike the officers in Warner and Painter, Deese promptly returned defendant’s identification card. Nevertheless, when Deese did so, defendant was cognizant that Deese was investigating whether defendant was the subject of any outstanding warrants. Although the state insists to the contrary, we find it difficult to posit that a reasonable person would think that he or she was free to leave at a time when that person is the investigatory subject of a pending warrant check. We further observe that, in this case, Deese did nothing to dispel what would have been an objectively reasonable belief that defendant was restrained from leaving until Deese had received the results of the warrant check. Instead, immediately upon returning defendant’s identification card, Deese questioned defendant about whether defendant was carrying any weapons, knives, or illegal drugs, and he asked defendant for consent to search defendant’s person.
Under those circumstances, we conclude that the trial court erred by ruling that Deese’s encounter with defendant did not restrain defendant’s liberty so as to constitute a “stop” under ORS 131.615(1) (1995). Because that restraint was not justified by a reasonable suspicion of criminal activity, we further conclude that that encounter violated both ORS 131.615(1) (1995) and Article I, section 9.
[20] C. Admissibility of State’s Evidence from Consent Search Following Illegal Stop under Oregon Law
Having concluded that Deese’s encounter with defendant was unlawful, we now must consider the effect of that illegality upon the admissibility of the state’s evidence from the consent search that followed. In doing so, we first clarify the two related, but distinct, ways that a violation of a defendant’s rights under Article I, section 9, may affect the validity of a defendant’s subsequent consent to a search. See generally State v. Weaver, 319 Or 212, 219, 874 P2d 1322 (1994) (discussing general categories of challenges to consent searches).
First, illegal police conduct violating a defendant’s rights under Article I, section 9, may negate a defendant’s consent to a search upon the ground that that police conduct rendered the defendant’s consent involuntary. Id. Although this court previously has stated that “the burden [of persuasion] on the police to show voluntariness when consent occurs after illegal police conduct is greater than when no illegality has occurred[,]” State v. Kennedy, 290 Or 493, 502, 624 P2d 93 (1981), we reiterate here that the state’s burden of persuasion in establishing the voluntariness of a defendant’s consent under Article I, section 9, does not vary according to the lawfulness of the circumstances in which the defendant’s consent was obtained. See Stevens, 311 Or at 136-37 (defining state’s burden in voluntariness inquiry under Article I, section 9). Instead, as a threshold matter in any case in which the state relies upon a defendant’s consent to validate a warrantless search, the state must prove by a preponderance of the evidence that the defendant’s consent was voluntary. Id. In deciding whether the state has satisfied that burden for the purposes of Article I, section 9, the test is whether, under the totality of the circumstances, the defendant’s consent was an act of free will or, instead, resulted from police coercion, either express or implied. State v. Wolfe, 295 Or 567, 572, 669 P2d 320 (1983).
Although unlawful police conduct does not alter the state’s burden in establishing the voluntariness of a defendant’s consent, the effect of that unlawful conduct upon the [21] defendant’s capacity to exercise his or her free will is one circumstance that may be relevant to the decision whether the defendant’s consent was voluntary for purposes of Article I, section 9. Rodriguez, 317 Or at 38-39. In some instances — for example, when a defendant consented in acquiescence to a claim of lawful police authority — the court’s determination as to the lawfulness of the police conduct may bear directly upon its determination of the voluntariness of the defendant’s consent. See, e.g., State v. Williamson, 307 Or 621, 626-27, 772 P2d 404 (1989) (Carson, J., concurring) (defendant’s consent to search involuntary when given in response to false claim of authority); State v. Hirsch, 267 Or 613, 622, 518 P2d 649 (1974) (“ ‘If the officers threaten only to do what the law permits them to do, the coercion that the threat may produce is not constitutionally objectionable.’ ” (quoting State v. Douglas, 260 Or 60, 81, 488 P2d 1366 (1971) (O’Connell, C. J., dissenting)). In other circumstances, however, prior unlawful police conduct may bear upon the court’s voluntariness inquiry under Article I, section 9, because that police conduct, irrespective of any determination as to its illegality, had the effect of coercing the defendant’s consent. See Rodriguez, 317 Or at 38, 38 n 13 (noting same).
In addition to affecting the voluntariness of a defendant’s consent, this court also has recognized a related, but independent, reason why police conduct violating a defendant’s rights under Article I, section 9, may vitiate a defendant’s subsequent consent to a search. Specifically, similarly to the United States Supreme Court’s holding in Wong Sun v. United States, 371 US 471, 83 S Ct 407, 9 L Ed 2d 411 (1963), that a defendant’s voluntary statements may be the inadmissible “fruits” of a prior Fourth Amendment violation, this court has held that Article I, section 9, may require exclusion of evidence from an otherwise valid consent search upon the ground that the defendant’s consent derived from a preceding violation of the defendant’s rights under that state constitutional provision. See, e.g., Rodriguez, 317 Or at 38-42 (so stating). In Rodriguez, again similarly to the Supreme Court in Wong Sun, this court described that second inquiry as an “exploitation” inquiry.12 Id.
[22] As discussed above, in the present case, defendant has not challenged the trial court’s ruling that the state established the voluntariness of his consent. Thus, the only issue before us is whether Article I, section 9, requires exclusion of the state’s evidence because defendant’s consent derived from — or, stated differently, was obtained by “exploitation” of — the unlawful stop. We turn to the state’s arguments concerning that issue now.
The state contends that, in the context of a consent search, an “exploitation” inquiry serves only two functions— that is, to ensure that a defendant’s consent is truly voluntary and to deter unlawful police conduct. Based upon that premise, the state asserts that, because the exclusionary rule for violations of Article I, section 9 (hereafter “Oregon exclusionary rule”) is not predicated upon the same deterrence rationale as the Fourth Amendment exclusionary rule, this court has erred in concluding that evidence obtained as a result of a defendant’s voluntary act — such as a defendant’s voluntary grant of consent to a search — similarly may be rendered inadmissible under the Oregon exclusionary rule by a prior violation of the defendant’s rights under Article I, section 9. According to the state, unless unlawful police conduct caused the defendant’s consent to be involuntary, such conduct does not affect the admissibility of evidence from a consent search under the Oregon exclusionary rule, because a [23] defendant’s voluntary act of consenting necessarily operates as an independent source for any evidence that is procured in a search based upon that consent.
To explain our disagreement with the state’s contention that an “exploitation” inquiry in the context of an otherwise valid consent search is incompatible with the Oregon exclusionary rule, we begin by describing the objective — and consequently also the operation — of that rule. See State ex rel Juv. Dept. v. Rogers, 314 Or 114, 118-19, 836 P2d 127 (1992) (applicability of Oregon exclusionary rule determined in light of reasons for that rule). In doing so, we think it helpful first to contrast that rule with the Fourth Amendment exclusionary rule.13
Although its earlier decisions sometimes suggested other considerations at work, the United States Supreme Court for many years consistently has identified deterrence of unlawful police conduct as the primary purpose underlying the exclusionary rule for violations of the Fourth Amendment. See United States v. Leon, 468 US 897, 905-06, 104 S Ct 3405, 82 L Ed 2d 677 (1984) (identifying deterrence function as basis of Fourth Amendment exclusionary rule, but acknowledging that Court’s prior decisions sometimes implied that exclusionary rule was necessary corollary of Fourth Amendment). In so holding, the Supreme Court has characterized the Fourth Amendment exclusionary rule as a judicially created remedial device that applies to only those circumstances in which its remedial objectives most efficaciously will be served. See United States v. Calandra, 414 US 338, 348, 94 S Ct 613, 38 L Ed 2d 561 (1974) (so stating). Based upon that theory, the Supreme Court has defined the breadth of the Fourth Amendment exclusionary rule by assessing whether the deterrence benefits in applying that rule outweigh the costs of excluding otherwise admissible evidence. See Leon, 468 US at 909-10 (noting that analytical approach).
[24] As the state correctly recognizes, this court, by contrast, explicitly has rejected the view that the Oregon exclusionary rule is predicated upon a deterrence rationale. Davis, 295 Or at 233-37. Instead, this court has held that the Oregon exclusionary rule is a constitutionally mandated rule that serves to vindicate a defendant’s personal rights. In other words, the right to be free from unreasonable searches and seizures under Article I, section 9, also encompasses the right to be free from the use of evidence obtained in violation of that state constitutional provision.14 See State v. Davis, 313 Or 246, 249, 834 P2d 1008 (1992) (so stating). In that vein, this court has explained that the aim of the Oregon exclusionary rule is to restore a defendant to the same position as if “the government’s officers had stayed within the law.” Davis, 295 Or at 234. Thus, in deciding the applicability of the Oregon exclusionary rule, the critical inquiry is whether the state obtained the evidence sought to be suppressed as a result of a violation of the defendant’s rights under Article I, section 9. See, e.g., State v. Smith, 327 Or 366, 379-80, 963 P2d 642 (1998) (holding evidence obtained following unlawful police conduct nevertheless admissible, because evidence not obtained by virtue of that unlawful conduct).
Although the aim of the Oregon exclusionary rule is to restore a defendant to the same position as if “the government’s officers had stayed within the law,” Davis, 295 Or at [25]*25234, this court has rejected the notion that evidence is rendered inadmissible under Article I, section 9, simply because it was obtained after unlawful police conduct or because it would not have been obtained “but for” unlawful police conduct. See, e.g., Rodriguez, 317 Or at 40 (evidence not rendered inadmissible under Article I, section 9, because it would not have been obtained “but for” unlawful police conduct). Instead, as this court recently explained in State v. Johnson, 335 Or 511, 520-21, 73 P3d 282 (2003), after a defendant establishes the existence of a minimal factual nexus — that is, at minimum, the existence of a ‘Taut for” relationship— between the evidence sought to be suppressed and prior unlawful police conduct, the state nevertheless may establish that the disputed evidence is admissible under Article I, section 9, by proving that the evidence did not derive from the preceding illegality. To make that showing, the state must prove that either (1) the police inevitably would have obtained the disputed evidence through lawful procedures even without the violation of the defendant’s rights under Article I, section 9, see, e.g., Johnson, 335 Or at 522-26 (discussing principle); (2) the police obtained the disputed evidence independently of the violation of the defendant’s rights under Article I, section 9, see, e.g., Smith, 327 Or at 379-80 (discussing principle); or (3) the preceding violation of the defendant’s rights under Article I, section 9, has such a tenuous factual link to the disputed evidence that that unlawful police conduct cannot be viewed properly as the source of that evidence, see, e.g., State v. Jones, 248 Or 428, 433-34, 435 P2d 317 (1967) (discussing principle).
In each of those above-described circumstances, the admission of the challenged evidence does not offend Article I, section 9, because the defendant has not been disadvantaged as a result of the unlawful police conduct or, stated differently, because the defendant is not placed in a worse position than if the governmental officers had acted within the bounds of the law. In short, suppression of evidence in such circumstances would not serve to vindicate the defendant’s rights under Article I, section 9, because the evidence sought to be suppressed did not result from a violation of the defendant’s rights under Article I, section 9. See State v. Sargent, 323 Or 455, 462-63, 918 P2d 819 (1996) (evidence not subject [26] to suppression under Article I, section 9, if no causal connection between evidence sought to be suppressed and unlawful police conduct); Rodriguez, 317 Or at 39 (same).
As noted above, in the present case, the state contends that a defendant’s voluntary act of consenting necessarily severs the causal link between evidence that the state obtains from a search based upon that consent and any antecedent violation of the defendant’s rights under Article I, section 9. Starting from that premise, the state argues that the Oregon exclusionary rule does not require exclusion of evidence from a consent search whenever the defendant’s consent is voluntary because the exclusion of evidence in such circumstances would not serve to vindicate the defendant’s rights under Article I, section 9.
On the surface, the state finds some support for that position in this court’s decision in State v. Quinn, 290 Or 383, 623 P2d 630 (1981), as well as its decisions in Kennedy, 290 Or 493, scad Rodriguez, 317 Or 27. In each of those cases, this court concluded that the preceding violation of the defendant’s rights under Article I, section 9, did not rob the defendant’s consent of its efficacy as an independent justification for the search that produced the disputed evidence. Before examining those holdings in Kennedy and Rodriguez, we first dispel the idea that this court’s Article I, section 9, holding in Quinn remains viable law.
In Quinn, 290 Or 383, the police discovered evidence that implicated the defendant in a murder solely as the result of an unlawful search of the defendant’s vehicle. Id. at 387. Without informing the defendant of that discovery, the police sought and obtained the defendant’s consent to search the vehicle a second time. Id. at 388. The police seized the previously discovered evidence pursuant to that second search, and, after being confronted with that evidence, the defendant eventually confessed to the murder. Id. at 388-89.
On review before this court, the defendant challenged the admissibility of evidence from the consent search under Article I, section 9. Purporting to embrace the analysis articulated in Wong Sun, 371 US 471, this court rejected the defendant’s assertion that the evidence seized in the consent search had derived from the preceding unlawful search [27] because, although the police had sought the defendant’s consent solely as a result of the inculpatory evidence discovered from the unlawful search, the defendant had been ignorant of that unlawful search at the time when he granted his consent.15 Id. at 396. Notably, in reaching that holding, this court identified deterrence as the underlying purpose of the Oregon exclusionary rule and also stressed that the unlawful search had resulted from a good-faith police mistake about the state of the law. Id. at 397.
In his concurring opinion in Weaver, 319 Or at 222-24, Justice Gillette cautioned that this court’s conclusion in Quinn “approach [ed] being (and it may in fact be) unsupportable.” Specifically, in light of the fact that the police had sought the defendant’s consent in Quinn only because of the discovery of inculpatory evidence during the preceding unlawful search, Justice Gillette opined that “[a] more direct exploitation of illegal government activity would be difficult to posit.” Id. at 224. For the reasons explained below, we agree with that view and take this opportunity to overrule expressly that part of this court’s decision in Quinn.
This court repeatedly has recognized that, even when a defendant’s consent is voluntary — that is, when the defendant’s free will has not been overcome by police coercion— that consent is insufficient to establish the admissibility of evidence from a warrantless search if the state cannot prove that the consent was independent of, or only tenuously related to, any preceding violation of the defendant’s rights under Article I, section 9. See, e.g., Rodriguez, 317 Or at 41-42 (examining whether defendant’s voluntary consent resulted from illegal arrest); State v. Dominguez-Martinez, 321 Or 206, 214, 895 P2d 306 (1995) (concluding that evidence obtained from presumably voluntary consent search during illegal traffic stop was inadmissible). Unless the state is able [28] to make that showing, then the defendant’s consent cannot operate to validate a warrantless search because the defendant’s consent itself derived from a violation of the defendant’s rights under that state constitutional provision. To not require suppression in such circumstances would be inconsistent with the previously described rationale underlying the Oregon exclusionary rule, that is, to place a defendant in the same position as if the governmental officers had acted within the bounds of the law. See Rodriguez, 317 Or at 39 (“There may be cases in which suppression of evidence obtained during a [voluntary] consent search may be necessary to vindicate a defendant’s rights that were violated by earlier, unlawful police conduct.”).
Although a showing of voluntariness alone is insufficient to establish the admissibility of evidence from a consent search following a violation of the defendant’s rights under Article I, section 9, this court also has rejected the notion that any consent obtained after unlawful police conduct is invalid per se, no matter how tenuously related to that unlawful conduct. See id. at 39-40 (noting same). Instead, as discussed generally above, see 339 Or at 24-26 (discussing operation of Oregon exclusionary rule), the admissibility of evidence obtained in such circumstances is a fact-specific determination that depends upon the nature of the causal connection between the defendant’s consent and the preceding violation of the defendant’s rights under Article I, section 9. See Rodriguez, 317 Or at 39-40 (discussing same). In Rodriguez, this court framed that inquiry in this context by explaining that a causal connection requiring suppression exists “when the police take advantage of the circumstances of their unlawful conduct to obtain the [defendant’s] consent to search.” Id. at 40.16 Although Rodriguez did not identify what factors to consider in making that determination, this court’s Article I, section 9, jurisprudence offers some guidance. In cases decided since Quinn, one consideration that [29] emerges is whether the police sought the defendant’s consent only as the result of knowledge of inculpatory evidence stemming from a prior unlawful search.
This court’s decision in State v. Carston, 323 Or 75, 913 P2d 709 (1996), illustrates the application of that consideration.17 In Carston, an informant had advised the police about a scheduled drug sale after he illegally intercepted a cordless telephone conversation between the codefendants. Id. at 78. The informant reported that a man had made arrangements to buy $300 of “really good stuff’ and had informed the seller that he would be driving a four-door Suzuki. Id. Based upon that information, the police went to the residence where the drug transaction was scheduled to take place and then followed a four-door Suzuki as it drove away from that residence. Id. The police subsequently stopped that vehicle for a traffic violation and, during that stop, asked one of the defendants for his consent to search the vehicle. Id. at 79. The defendant granted his consent, and the police discovered drugs and drug paraphernalia in a closed container in the vehicle. Id. Based in part upon that evidence, the state charged the defendants with manufacture and delivery of a controlled substance, ORS 475.992.
Before trial, among other things, the defendants moved to suppress the evidence from the consent search. The trial court first determined that the initial stop of the vehicle had been lawful and that officer safety concerns had justified both a patdown search of the defendants and a limited search of the passenger compartment of the vehicle for weapons. Id. at 86. The trial court then went on to rule, however, that the evidence derived from the consent search nevertheless was inadmissible because, after assuring their safety, the officers had questioned the defendants about illicit drugs and had sought the defendant’s consent to search solely based upon information illegally obtained by the informant. Id. On review, this court agreed with the trial court that, in light of that causal link between the defendant’s consent and the prior unlawful search, suppression of the evidence was required. Id. at 86-87.
[30] Applying that same reasoning to the facts at issue in Quinn, it is apparent that — although capable of reconciliation with the deterrence rationale of the Fourth Amendment exclusionary rule — this court’s conclusion in that case is untenable under Article I, section 9. Although the police in Quinn had conducted their first unlawful search of the defendant’s vehicle under the mistaken belief that they were authorized to do so, the inculpatory evidence discovered during that search unquestionably derived from a violation of the defendant’s rights under Article I, section 9. Solely as a result of that violation, the police then sought the defendant’s consent to search his vehicle a second time in order to seize that previously discovered evidence. In light of that causal link between the violation of the defendant’s rights under Article I, section 9, and the defendant’s subsequent consent, the police cannot be said to have obtained the defendant’s consent independently of their prior unlawful conduct, and, for that reason, that consent could not have operated as an independent justification for the search under Article I, section 9.
Having clarified why Quinn does not assist the state here, we now turn to this court’s decisions in Kennedy and Rodriguez. By contrast to the facts at issue in Quinn, the governmental officers in Kennedy and Rodriguez did not seek the defendant’s consent only as a result of knowledge of inculpatory evidence gained from a prior unlawful search. Instead, each case involved the more difficult question of the validity of a defendant’s consent given during a purportedly unlawful seizure. As discussed below, contrary to other of its precedents, this court concluded in both cases that the violation of the defendant’s rights under Article I, section 9, had not destroyed the efficacy of the defendant’s consent to the search that produced the disputed evidence. We examine the basis of each of those holdings in more detail below.
In Kennedy, 290 Or 493, two police officers approached the defendant as he was preparing to exit the Portland airport and informed him that they had information that he might be in possession of illegal drugs. The defendant denied that allegation and then, without any prompting, asked the officers if they wished to search his luggage. Id. at 496. The officers accepted his invitation and subsequently [31] discovered a small vial with cocaine residue in the defendant’s bag. Id.
On review, after assuming that the police interaction with defendant had been unlawful, this court determined that the evidence of the vial nevertheless was admissible based upon “the absence of any coercive circumstances surrounding [the] defendant’s consent, and [the] defendant’s volunteering of consent, with no request by the police.” Id. at 506. In reaching that conclusion, this court stated that the validity of the defendant’s consent in such circumstances hinged upon only a determination of voluntariness, but added that the state faced a higher burden in establishing voluntariness when the defendant’s consent followed 'unlawful police conduct. Id. at 502. Although we reject that formulation, see 339 Or at 20-21, we do not quarrel with the underlying concern that it expresses — namely, that Article I, section 9, requires a careful examination of the causal connection between a preceding illegality and the defendant’s consent when the police gain a defendant’s consent after unlawful police conduct. Although framing that issue as one concerning “exploitation,” this court confirmed the necessity of such an inquiry in its decision in Rodriguez.
In Rodriguez, 317 Or 27, after presenting the defendant with an arrest warrant that may have been unlawful, the governmental agent warned the defendant of his rights to remain silent and to have counsel, and then asked the defendant whether he had any drugs or guns in his apartment. The defendant responded to that question by stating “No, go ahead and look.” Id. at 30. When the agent questioned the defendant whether he had intended to authorize a search, the defendant repeated his willingness to allow the officers to search his apartment, and the agents subsequently discovered two guns. Id.
On review, after again assuming that the defendant’s arrest had been unlawful, this court concluded that suppression of the guns nevertheless was not required under Article I, section 9. After clarifying that the voluntariness of the defendant’s consent was not in question, this court explained that the issue, instead, was whether the defendant’s consent had derived from — or, in the words of [32] Rodriguez, had been obtained by “exploitation” of — the preceding purportedly unlawful seizure. Id. at 38-40. In answering that question in that case, this court examined the circumstances of the seizure and observed that the defendant spontaneously had offered his consent to the search. Id. at 41. Although the court recognized that, but for the unlawful arrest, the agent would not have been in a position to accept the defendant’s offer to allow a search, this court concluded that that causal connection alone was too tenuous to require suppression. Id.
Even if rejecting the state’s view that voluntariness alone is sufficient to establish the admissibility of evidence from a consent search following an unlawful seizure, the above-described conclusion in Rodriguez, like the conclusion in Kennedy, could be viewed as supporting the state’s position that suppression is not required in this case. Similarly to both Kennedy and Rodriguez, there is no evidence that Deese observed any sign of criminal conduct during his illegal detention of defendant that led to his request for defendant’s consent to a search.18 This court’s decisions in Kennedy and Rodriguez, however, do not stand for the proposition that suppression is required only if the unlawful police conduct had allowed the discovery of inculpatory evidence that led to a request for consent. Instead, this court’s case law both before and after Rodriguez makes clear that Article I, section 9, also requires the consideration of the effect of the unlawful police conduct upon the defendant’s decision to consent, even if that conduct did not rise to the level of overcoming the defendant’s free will. Several cases illustrate how this court has applied that consideration.
Although it was based upon Fourth Amendment precedents, this court’s decision in State v. Olson, 287 Or 157, 598 P2d 670 (1979), is on point. In that case, the defendant made inculpatory statements to the police after officers had [33] made a forcible nighttime entry into his residence and arrested him. After determining that both the entry and the subsequent arrest has been unlawful, this court concluded that the state had failed to show that those statements had not derived from that preceding unlawful police conduct and, for that reason, concluded that the statements were inadmissible under Article I, section 9.
This court reached a similar conclusion in Dominguez-Martinez, 321 Or 206.19 After lawfully stopping the defendant for making unsignaled lane changes, the officer tested the turn signals on the defendant’s vehicle and discovered that one of them was defective. Id. at 208. Rather than issue a citation, the officer instructed the defendant to repair the signal and then advised the defendant that he was free to go. Id. After making that statement, however, the officer continued to stand with his arm on the door of the defendant’s vehicle and then asked for the defendant’s consent to search the vehicle. Id. at 208-09. The defendant agreed, and the officer subsequently discovered illegal drugs in the vehicle. Id. at 209. On review, after finding that the officer had exceeded his statutory authority to detain the defendant, this court rejected the state’s argument that, under the facts of that case, the defendant’s voluntary consent nevertheless established the admissibility of the evidence from the search. Id. at 214.
This court’s decision in Toevs, 327 Or 525, offers a final example.20 In that case, the officers stopped the defendant for driving at night without the use of headlights. After running a records check and instructing the defendant to turn on his lights, the officer advised the defendant that he was free to go. Id. at 529. After making that statement, however, the officer then immediately asked the defendant for his consent to search the vehicle and questioned the defendant about whether he was carrying any illegal drugs. Id. The defendant initially withheld his consent to a search, but, after further questioning, he admitted to the officers that he [34] was in possession of drugs. Id. On review, this court determined that the officer unlawfully had seized the defendant at the time that he requested the defendant’s consent and questioned the defendant. Id. at 537. Without considering voluntariness, this court further determined that, under the facts of that case, that illegality required the suppression of the evidence discovered as a result of the defendant’s statements. Id. at 537-38.
As the above-described cases illustrate, this court’s conclusions in Kennedy and Rodriguez that suppression was not required to vindicate those defendants’ rights must be understood in light of the specific facts of each of those cases — particularly, the facts that those defendants both had volunteered to allow a search without any police prompting and, in Rodriguez, that the police had provided the defendant with Miranda warnings before questioning him about drugs or weapons. In the absence of such intervening circumstances — or other circumstances mitigating the effect of the unlawful police conduct — this court has required suppression under facts similar to those at issue in Kennedy and Rodriguez. See, e.g., State v. Amaya, 336 Or 616, 627, 89 P3d 1163 (2004) (explaining necessity of considering legality of stop in deciding admissibility of defendant’s presumably voluntary statements by stating that, “if [the officer] had seized [the] defendant in violation of her Article I, section 9, rights before he questioned her about the bag, then his questions about the bag also were unlawful, and the evidence that the state obtained as a result of those questions must be suppressed”); State v. Morton, 326 Or 466, 470, 953 P2d 374 (1998) (when defendant dropped container only after police had begun taking defendant into custody, “the state cannot separate the act of arrest from the dropping of the container; the seizure [of the container] can be proper only if the arrest itself was authorized by a valid warrant”); compare with Douglas, 260 Or 60 (regardless of legality of police conduct, no suppression is required when defendant granted his consent in response to prompting by his brother-in-law, rather than police actions).
With that background in mind, we return to this case. In doing so, we first summarize our preceding discussion: After a defendant shows a minimal factual nexus [35] between unlawful police conduct and the defendant’s consent, then the state has the burden to prove that the defendant’s consent was independent of, or only tenuously related to, the unlawful police conduct. Deciding whether the state has satisfied that burden requires a fact-specific inquiry into the totality of the circumstances to determine the nature of the causal connection between the unlawful police conduct and the defendant’s consent. A causal connection requiring suppression may exist because the police sought the defendant’s consent solely as the result of knowledge of inculpatory evidence obtained from unlawful police conduct. A causal connection requiring suppression also may exist because the unlawful police conduct, even if not overcoming the defendant’s free will, significantly affected the defendant’s decision to consent. Although determining the existence of such a causal connection requires examination of the specific facts at issue in a particular case, we view several considerations to be relevant to that determination, including (1) the temporal proximity between the unlawful police conduct and the defendant’s consent, (2) the existence of any intervening circumstances, and (3) the presence of any circumstances — such as, for example, a police officer informing the defendant of the right to refuse consent — that mitigated the effect of the unlawful police conduct.21 With those considerations in mind, we now decide whether the state has satisfied its burden in this case.
[36] In our view, the circumstances at issue here more closely resemble the circumstances at issue in Dominguez-Martinez and Toevs, rather than the circumstances at issue in Kennedy and Rodriguez. Similarly to the defendants in Dominguez-Martinez and Toevs, defendant here consented to the search during an unlawful stop. Unlike the defendants in Rodriguez and Kennedy, defendant’s grant of consent was not spontaneous but, instead, was made only in response to Deese’s request that defendant allow a search. Deese made that request immediately after he had questioned defendant about whether defendant was carrying any weapons or illegal drugs and while he was waiting for the results of defendant’s warrant check. Given the close temporal proximity between the illegal detention and defendant’s consent, and the absence of any intervening circumstances or other circumstances mitigating the effect of that unlawful police conduct, we cannot say that the state has proved that defendant’s decision to consent, even if voluntary, was not the product of the preceding violation of defendant’s rights under Article I, section 9. We therefore conclude that the unlawful seizure of defendant vitiated his consent to the search and, for that reason, the evidence from that search is inadmissible under Article I, section 9.
III. CONCLUSION
In sum, we conclude that, under the facts of this case, Deese’s encounter with defendant constituted an unlawful stop under ORS 131.615(1) (1995) and, consequently, also an unlawful “seizure” under Article I, section 9. We also reaffirm that, to vindicate a violation of a defendant’s rights under Article I, section 9, evidence from a search following an otherwise valid consent is subject to suppression under the Oregon exclusionary rule if the defendant’s consent is the product of preceding unlawful police conduct. Finally, under the facts of this case, we conclude that the state failed to satisfy its burden of proving that defendant’s consent was independent of, or only tenuously related to, the [37] preceding unlawful stop. Based upon those conclusions, we affirm the decision of the Court of Appeals and reverse the judgment of the trial court.
The decision of the Court of Appeals is affirmed. The judgment of the circuit court is reversed.
Footnotes
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