WALLACE, Senior Circuit Judge.
Following a lawful traffic stop of a car in which Defendant-Appellee Pulliam was a passenger, the police illegally detained him and the car’s driver, and illegally searched the car. The search produced a gun, and Pulliam was charged with being a felon in possession of a firearm in violation of 18 U.S.C. § 922(g)(1).
The government appeals from the district court’s order suppressing the gun. The district court had jurisdiction pursuant to 18 U.S.C. § 3231, and we have jurisdiction pursuant to 18 U.S.C. § 3731. Because Pulliam lacks standing to object to the vehicle search, and the gun’s discovery was not the product of Pulliam’s unlawful detention, the gun should not have been suppressed. We therefore reverse and remand.
[784]*784I.
Officers Algren and Sambrano, both members of the Los Angeles Police Department Gang Enforcement Division, were patrolling in their vehicle through part of the city known for gang activity. Gang crime was expected because it was “Rollin’ 60’s day,” the birthday of the Rol-lin’ 60’s gang which operates in that area.
The officers stopped in front of a building Algren knew to be a gang hangout, because he had responded to calls there and had seen other officers find firearms and drugs in the building. When the officers looked through the front gate into the courtyard, they saw Donte Richards and Pulliam. Algren recognized Richards as a member of the Rollin’ 60’s gang and knew him to be a parolee. Neither officer recognized Pulliam. Richards and Pulliam looked “surprised” when they saw the officers and began to speak with one another in a “furtive” fashion. Sambrano thought it clear that Richards and Pulliam had intended to walk out of the courtyard but reconsidered when they saw the officers.
Richards then walked over to the police car and spoke with Algren, while Pulliam stayed in the courtyard. Algren believed this conversation was intended to distract the officers and “suspected that [Pulliam] was a wanted suspect or was armed.” The officers drove away when the conversation ended, but quickly positioned themselves to be able to follow the two men. Sambra-no thought Richards and Pulliam would likely leave the apartment building in a grey Dodge Stratus car parked nearby. Sambrano concedes that the officers had already decided that they were “going to follow them” and “find a reason to stop them.”
A few moments later, the officers saw the car drive by with Richards driving. After following for two blocks, the officers noticed that the car’s left rear brake light did not operate when the car slowed. They also assert that the car rolled through a stop sign. Algren and Sambra-no then decided to stop the car, and activated the patrol car’s siren and lights. Richards did not immediately respond. He continued driving for approximately 45 seconds covering 150 yards, even though there was room for him to pull over to the curb (a point that Richards disputed). This allegedly caused Algren’s suspicion to increase; he feared that Richards and Pul-liam would flee either in the car or on foot, or would have a violent altercation with the officers.
When the car stopped, the officers got out of their car with their weapons aimed low. Richards and Pulliam were ordered out of the car and to walk to the curb, where they were handcuffed and patted down. Algren then went directly to the car, looked under the passenger seat and found a gun. The officers found no weapons or other contraband on Pulliam during the earlier patdown, and did not question either of the men in the brief period before the gun was found.
Pulliam later admitted to owning the gun, and gave written and audio-taped statements about the offense. He was charged with being a felon in possession of a firearm. Pulliam then filed a motion to suppress the gun and his incriminating statements. In opposition to the motion, the government argued, among other things, that Pulliam, as a mere passenger in the car, had standing to challenge the stop of the vehicle but not the search itself; that the car was lawfully stopped on the basis of the various alleged traffic violations; that the gun was not the “fruit” of Pulliam’s detention following the stop; that the officers had reasonable suspicion to detain Pulliam because they suspected that he posed a danger to them; and that the gun inevitably would have been diseov-[785]*785ered during a lawful parole search of Richards.
The district court held a suppression hearing at which Algren, Sambrano, Richards, and Richards’ sister, Monique Robinson, testified. Richards had earlier stated in a declaration that Robinson owns the car and that Pulliam does not drive or have keys to it. At the hearing, Robinson also said Pulliam has no ownership interest in the car and never borrows it from her. Pulliam’s counsel elicited testimony from Robinson suggesting that the brake light was working and that the officers might themselves have broken it to manufacture a reason for stopping the car.
The district court also asked Sambrano about the officers’ purpose for each step in their encounter with Pulliam. Sambrano explained that they stopped the car because of the traffic violations; ordered Richards and Pulliam out of the car and patted them down for safety concerns; and detained Richards and Pulliam in order to identify them. The court asked, “You effected a traffic stop. What purpose did you have in identifying the passengers?” Sambrano responded:
The purpose is being that working the gang unit — that one of our ultimate goals to identify persons who either are affiliates or associates with known gang members. And that goes into part with our intelligence to identify the car, the vehicle, that gang members are driving, who they are hanging out with, or who’s hanging out with them.
After hearing arguments from counsel, the district court granted the suppression motion. The court focused on whether there was reasonable suspicion for the stop, found that the taillight was not working, and concluded that this provided authority for stopping the car. But it held that the officers had no reasonable basis for going further, and that the car search was invalid. It also stated that there was no reason to get to the inevitable discovery doctrine.
II.
On appeal, the government concedes that the officers lacked authority either to detain Pulliam or to search the car, and it does not presently challenge the district court’s ruling suppressing Pulliam’s statements. In addition, Pulliam does not contest the district court’s ruling that the initial stop of the car was lawful, given the malfunctioning taillight. Nor does he specifically challenge being ordered out of the car. Pulliam contends that the district court properly suppressed the gun as the fruit of a constitutional violation.
A.
We review de novo the district court’s suppression order and its implicit legal conclusion that Pulliam had standing to seek suppression of the gun; the underlying factual findings are reviewed for clear error. See United States v. Bynum, 362 F.3d 574, 578 (9th Cir.2004) (motion to suppress); United States v. Sarkisian, 197 F.3d 966, 986 (9th Cir.1999) (standing).
“[T]he exclusionary rule reaches not only primary evidence obtained as a direct result of an illegal search or seizure, but also evidence later discovered and found to be derivative of an illegality or ‘fruit of the poisonous tree.’ ” Segura v. United States, 468 U.S. 796, 804, 104 S.Ct. 3380, 82 L.Ed.2d 599 (1984) (citations omitted). “It ‘extends as well to the indirect as the direct products’ of unconstitutional conduct.” Id., quoting Wong Sun v. United States, 371 U.S. 471, 484, 83 S.Ct. 407, 9 L.Ed.2d 441 (1963). In this case, we must apply two well-established principles that limit the reach of the exclusionary rule.
The first is that “[a] person who is aggrieved by an illegal search and sei[786]*786zure only through the introduction of damaging evidence secured by a search of a third person’s premises or property has not had any of his Fourth Amendment rights infringed.” Rakas v. Illinois, 439 U.S. 128, 134, 99 S.Ct. 421, 58 L.Ed.2d 387 (1978). Thus, a person seeking to exclude evidence allegedly obtained in violation of the fourth amendment must have standing to challenge the illegal conduct that led to the discovery of the evidence. “[T]o say that a party lacks fourth amendment standing is to say that his reasonable expectation of privacy has not been infringed. It is with this understanding that we use ‘standing’ as a shorthand term.” United States v. Taketa, 923 F.2d 665, 669-70 (9th Cir.1991) (citation omitted).
The second principle is that suppression is not justified unless the evidence is “ ‘in some sense the product of illegal governmental activity.’ ” Segura, 468 U.S. at 815, 104 S.Ct. 3380, quoting United States v. Crews, 445 U.S. 463, 471, 100 S.Ct. 1244, 63 L.Ed.2d 537 (1980). Pursuant to this basic principle of causation, “evidence will not be excluded as ‘fruit’ unless the illegality 'is at least the ‘but for’ cause of the discovery of the evidence.” Id.
Applying these principles to this case, we must first determine which of the officers’ actions Pulliam has standing to challenge. As a passenger with no possessory interest in the car Richards was driving, Pulliam “ ‘has no reasonable expectation of privacy in a car that would permit [his] Fourth Amendment challenge to a search of the car.’ ” United States v. Twilley, 222 F.3d 1092, 1095 (9th Cir.2000) (alteration in original), quoting United States v. Eylicio-Montoya, 70 F.3d 1158, 1162 (10th Cir.1995). Furthermore, Pulliam “made no showing that [he] had any legitimate expectation of privacy in the ... area under the seat of the car in whichfhe was] merely [a] passenger[ ],” as this is an “area[ ] in which a passenger qua passenger simply would not normally have a legitimate expectation of privacy.” Rakas, 439 U.S. at 148-49, 99 S.Ct. 421. Similarly, the mere fact that Pulliam “claimed ownership” of the gun does not confer standing upon him to seek its suppression. Rawlings v. Kentucky, 448 U.S. 98, 105, 100 S.Ct. 2556, 65 L.Ed.2d 633 (1980).
In addition, Pulliam does not argue that the detention of the car after the stop constituted a de facto seizure of his person. That is, he does not contend that even if the officers had permitted him to leave, he nonetheless could not reasonably have been expected to do so because the officers continued to detain the car. Cf. United States v. Dortch, 199 F.3d 193, 197 n. 4 (5th Cir.1999) (“Dortch’s complaint is not that the vehicle 4537 was detained or improperly searched, but rather that he was improperly seized in that, under the circumstances, he would not feel free to leave without his vehicle ... and because he could not reasonably be expected to wander off down the highway in an unfamiliar area”). We therefore need not decide whether such an argument might have enabled Pulliam to challenge the evidence derived from the car’s illegal detention.1
[787]*787But, Pulliam does have standing to contest the legality of his own detention. See United States v. DeLuca, 269 F.3d 1128, 1132 (10th Cir.2001) (7F “[A]lthough a defendant may lack the requisite possessory or ownership interest in a vehicle to directly challenge a search of that vehicle, the defendant may nonetheless contest the lawfulness of his own detention and seek to suppress evidence found in the vehicle as the fruit of the [defendant’s] illegal detention’ ”) (quoting United States v. Nava-Ramirez, 210 F.3d 1128, 1131 (10th Cir.2000)). Thus, to suppress the gun, Pulliam must show that it is “ ‘in some sense the product’ ” of his unlawful detention. Segura, 468 U.S. at 815, 104 S.Ct. 3380, quoting Crews, 445 U.S. at 471, 100 S.Ct. 1244.
There are several ways a passenger such as Pulliam might show that evidence found in a car is the fruit of his own unlawful detention. He could “show that had he requested to leave the scene of the traffic stop, he would have been able to do so in [the] car.” DeLuca, 269 F.3d at 1133. Or, he could show that statements he made or evidence found on his person during his detention prompted the officers to search the car or enabled them to find evidence in it that otherwise would have remained hidden. Cf. United States v. Martell, 654 F.2d 1356, 1361 (9th Cir.1981) (detention which became unlawful due to length of time would taint evidence seized from appellants’ suitcases “only if the detention during the unlawful period contributed in some fashion to the search and seizure of the narcotics”; “[s]ince the agents conducted no interrogation of the appellants during the unlawful portion of their detention,” evidence was not tainted). In each of these nonexclusive examples, it can be argued that but for the detention, the evidence in the car would not have been found.
Here, Pulliam has failed to demonstrate that the gun is in some sense the product of his detention. The officers conducted no interrogation of him before searching the car, and found nothing incriminating during the patdown. Even if they had immediately released him rather than detaining him, the search of the car still would have occurred, and the gun would have been found. The discovery and seizure of the gun was simply in no sense the product of any violation of Pulliam’s fourth amendment rights.
B.
Pulliam, however, offers three arguments in support of the district court’s ruling which we now address.
1.
First, Pulliam argues that in the unusual circumstances of this case, his detention was the but-for cause of the gun’s discovery. He contends in his brief that “it is only because the officers wanted to know about Mr. Pulliam that they stopped the car.... Had Mr. Pulliam not been in the car, the car would not have been stopped, and the gun would not have been found.” But all this shows is that the officers’ purpose in stopping and searching the car was to investigate Pulliam, not that the gun was in some sense the product of his detention. The malfunctioning taillight provided lawful grounds for the stop, regardless of the officers’ motivations. See Whren v. United States, 517 U.S. 806, 813, 116 S.Ct. 1769, 135 L.Ed.2d 89 (1996) (rejecting the “argument that the constitu[788]*788tional reasonableness of traffic stops depends on the actual motivations of the individual officers involved”). In effect, Pulliam argues that he should be able to seek suppression successfully because he was the “target” of the search. The Supreme Court, however, has decisively rejected that theory. See Rakas, 439 U.S. at 132-33, 99 S.Ct. 421 (rejecting the proposition that “any criminal defendant at whom a search was ‘directed’ would have standing to contest the legality of that search and object to the admission at trial of evidence obtained as a result of the search”).2
2.
Pulliam also disputes that the relevant “illegality” for purposes of “fruits” analysis is his, and only his, detention. He argues that “[i]n the context of an auto stop, where the connection between the illegal official conduct and the discovery of the challenged evidence is a clear, swift, and unbroken chain, the primary illegality should be considered to be the detention of the car and its occupants — a single official decision.” Thus, he contends that a passenger should be able to seek suppression of the “fruits” of all constitutional violations that occur during a traffic stop— including those that do not affect' the passenger’s own fourth amendment rights— because the officials’ actions are closely related in time, place, and purpose. In support of this argument, Pulliam has cited decisions allowing passengers to challenge evidence found in vehicle searches following unlawful traffic stops. See, e.g., Twilley, 222 F.3d at 1095; United States v. Colin, 314 F.3d 439, 442-43, 446-47 (9th Cir.2002).
But Twilley and Collin are consistent with the standing and causation principles and are distinguishable from this case because they involved illegal traffic stops. See Twilley, 222 F.3d at 1095 (“ ‘[I]f the [passenger] could establish that the initial stop of the car violated the Fourth Amendment, then the evidence that was seized as a result of that stop would be subject to suppression as fruit of the poisonous tree’ ” (emphasis added) (internal quotation marks omitted) (quoting Eylicio-Montoya, 70 F.3d at 1163-64)). Since officials cannot physically stop a car without seizing its passengers, see Whren, 517 U.S. at 809-10, 116 S.Ct. 1769, a passenger who objects to the legality of a stop effectively is challenging the official action that caused a violation of his own rights. Thus, the standing principle is satisfied. Further, the causation principle is satisfied because evidence found in a vehicle search following an illegal stop “[ojrdinarily ... will be a product, of that stop.” United States v. Arvizu, 232 F.3d 1241, 1252 (9th Cir.2000), rev’d on other grounds, 534 U.S. 266, 122 S.Ct. 744, 151 L.Ed.2d 740 (2002).
But when, as here, the initial stop is lawful, the situation is different. The continued detention of the vehicle does not necessarily entail the detention of its occupants; they could simply be permitted to walk away. If a passenger is unlawfully detained after the stop, he can of course [789]*789seek to suppress evidence that is the product of that invasion of his own rights. But a passenger with no possessory interest in a vehicle usually cannot object to its continued detention or suppress the fruits of that detention, because “Fourth Amendment rights are personal rights which ... may not be vicariously asserted.” Rakas, 439 U.S. at 133-34, 99 S.Ct. 421 (internal quotation marks omitted).
We may not amalgamate the separate police actions of detaining the car, detaining each of its occupants, and searching the car, merely because they occurred in close proximity. To do so would be inconsistent with Supreme Court and our own precedent. See Martell, 654 F.2d at 1358, 1361 (where appellants claimed that narcotics found in their suitcases was the fruit of their unlawfully prolonged detention, “a conceptual difference exists between the detention of the appellants on the one hand, and the detention of their suitcases on the other”; since the detention of the suitcases was lawful and the appellants’ “detention during the unlawful period[did not] contribute[] in some fashion to the search and seizure of the narcotics,” the unlawful detention did “not taint the search and seizure of the suitcases”); United States v. Anderson, 663 F.2d 934, 941-42 (9th Cir.1981); cf. Rawlings, 448 U.S. at 104-06, 100 S.Ct. 2556 (defendant who lacked legitimate expectation of privacy in acquaintance’s purse could not challenge legality of search of that purse, even though search occurred while both defendant and his acquaintance were allegedly being illegally detained in same house); United States v. Ayon-Meza, 177 F.3d 1130, 1133 (9th Cir.1999) (where defendants challenged procedure by which officer made initial contact with them, each defendant could not object to use of procedure as to other defendants, because “one cannot vicariously assert the Fourth Amendment rights of another”).
In Martell, we rejected the dissent’s argument that the “scope of the fourth amendment violation” should include the entire course of police conduct merely because the simultaneous “seizures of the individuals and suitcases were part of a single, unified police action.” Id. at 1370 (D.Nelson, J., dissenting). This case involves even stronger reasons to treat the unlawful detention of an individual separately from other simultaneous, but discrete, police actions: while the appellants in Martell sought to “combine” their own detention with another action that also affected their rights (i.e., the search and seizure of their own suitcases), Pulliam proposes that we aggregate his detention with other actions that did not even implicate his fourth amendment interests. The law does not allow this.
Pulliam argues that the Fifth Circuit’s decision in United States v. Jones, 234 F.3d 234 (5th Cir.2000), “impliedly” supports his argument. In Jones, the appellants conceded that their rented car was lawfully stopped for a traffic violation, but argued that their prolonged detention became unlawful, that the driver’s consent to search the vehicle was tainted by the illegal detention, and that evidence found during a search of the car was the fruit of that unlawful detention. See id. at 239-40. The majority agreed, and held that the evidence should have been suppressed, without addressing the government’s contention that the defendants lacked standing to challenge the vehicle search. Id. at 240 n. 2. One judge dissented in part, arguing that it did not matter whether the driver validly consented to a search of the car, because the driver had “not met his burden under Rakas of demonstrating a possessory interest in the car.” Id. at 245 (Garza, J., dissenting).
Neither the majority opinion nor the partial dissent in Jones specifically ad[790]*790dressed the question raised here, which is whether the detention of a car’s occupants should be considered separately from the detention of the car. The most Pulliam can say about the Jones majority opinion is that it implicitly assumed the detention of the car’s occupants was tantamount to detention of the car itself. To the extent that the Jones majority opinion suggests that an individual who is unlawfully detained following a lawful vehicle stop may always secure suppression of evidence found in the car, even in the absence of standing to challenge directly the search and where the evidence is not the product of his own detention, we cannot follow it. Under Martell, the detention (and search) here of the car and the detention of its occupants were discrete police actions, that were required to be analyzed separately.
Since Pulliam has not argued that the detention of the car could amount to a de facto detention of his person, he “must show that the [evidence] would never have been found but for his, and only his, unlawful detention.” DeLuca, 269 F.3d at 1133. See also United States v. Carter, 14 F.3d 1150, 1153-55 (6th Cir.1994); United States v. Green, 275 F.3d 694, 700 (8th Cir.2001).3
3.
Finally, Pulliam contends that in order to break the causal link between his unlawful detention and the seizure of the gun, we must rely on a “perverted variation” of the “inevitable discovery” exception to the fruit-of-the-poisonous-tree doctrine. Pursuant to this exception, evidence that is illegally obtained is nonetheless admissible if it “would inevitably have been discover[791]*791ed through lawful means.” United States v. Ramirez-Sandoval, 872 F.2d 1392, 1396 (9th Cir.1989). Pulliam assumes that in reasoning that the gun would have been found as a result of the unlawful search of the vehicle even if he had not been unlawfully detained, we are essentially holding the gun is admissible because the search provides an alternative, inevitable means of discovery. Accordingly, he argues that because the search was unlawful, we are misapplying this exception. See United States v. Johnson, 380 F.3d 1013, 1014 (7th Cir.2004) (rejecting argument that illegally seized evidence was nonetheless admissible because it “had an alternative source in another illegal search but one that the defendant could not have challenged directly”).
If this ease involved any “exception” to the exclusionary rule at all, it would be the “independent source” exception, since the gun was actually found in a search of the car. See Ramirez-Sandoval, 872 F.2d at 1396 (“The ‘independent source’ exception operates to admit evidence that is actually found by legal means through sources unrelated to the illegal [conduct]” (emphasis added)).
We do not, however, have to apply either “exception” in this case because the indispensable causal connection between his detention and discovery of the gun has not been met. The requisite but-for causation is missing not only because the gun was found as a result of the search, but because his detention simply did not contribute or lead to the gun’s discovery. To illustrate this point, assume that Pulliam never got into the car with Richards, but instead walked off on his own while Richards drove away with the gun in the car. Imagine further that the officers stopped the car, found the gun, learned that it belonged to Pulliam, and then went to Pulliam’s home and illegally detained him. In this hypothetical situation, the gun’s discovery is not the product of Pulliam’s illegal detention, since the gun was found before the detention even occurred. To say that the gun would have been found even if he had not been detained is merely to recognize that the illegality, on its own, is not a sufficient or even a contributing cause of the gun’s discovery. The gun would thus be admissible without any consideration of an “exception” to the exclusionary rule.
The situation here is analytically identical to this hypothetical scenario. The only difference is that Pulliam was in the car and was detained by its side, but the detention itself was not the but-for cause of the gun’s discovery in the same sense as in the hypothetical situation. Thus, there is no need to apply the inevitable discovery or independent source doctrines and ask whether some other alternative means of discovery breaks the causal link. Nor need we consider whether unlawful alternative means can be used for purposes of these exceptions. We simply do not reach these issues.
The district court therefore erred in suppressing the gun.
REVERSED and REMANDED.