Opinion by Judge RICHARD C. TALLMAN; Partial Concurrence and Partial Dissent by JUDGE MILAN D. SMITH, JR.
TALLMAN, Circuit Judge:
Defendant-Appellant Todd Johnson pled guilty to one count of being a felon in possession of a firearm, in violation of 18 U.S.C. §§ 922(g) and 924(a)(1). On appeal Johnson argues (1) that the district court improperly denied his motion to suppress and (2) that the district court erred in declining to award him a one-level down•ward adjustment pursuant to § 3E.l.l(b) of the Sentencing Guidelines. We have jurisdiction under 28 U.S.C. § 1291, and we affirm.
[997] I
On October 19, 2006, Alaska State Trooper Vic Aye and Deputy Troy Meeks of the United States Marshals Service were serving federal warrants on the east side of Anchorage. The officers were wearing plain clothes and driving an unmarked sports utility vehicle. While the officers were stopped at a traffic light across from the First National Bank, Deputy Meeks noticed three suspicious individuals standing in the bank’s parking lot next to a tan Buick sedan. The car was parked about 20 feet from the bank’s front entrance and its hood was raised. The three men — later identified as Johnson, David Brookins, and Alvin Nelson — were not looking under the hood but instead appeared to be surveying the bank and the surrounding area. As the officers drove away, Deputy Meeks observed Johnson and Nelson head toward the bank’s front door. Johnson, who was wearing a hooded sweatshirt under a jacket, flipped up his hood partially obscuring his face.
His suspicions aroused, Deputy Meeks described to Trooper Aye what he had just witnessed. The officers decided to double back for another look. By the time they circled back to the bank, the sedan’s hood had been closed, and Brookins was alone in the vehicle sitting in the driver’s seat. The other two men were nowhere to be seen. Trooper Aye decided to enter the bank while Deputy Meeks stayed outside to surveil Brookins.
Once inside the bank, Trooper Aye immediately noticed a teller nervously watching Johnson and Nelson, who were standing in line. The men were whispering to each other, and Johnson appeared to be surveying the bank lobby. Trooper Aye approached another bank employee who also appeared to be eyeing the men. He surreptitiously identified himself as a state trooper and asked the employee if everything was alright. She responded “no,” and also appeared nervous.
Although not in uniform, Trooper Aye could still be recognized as a law enforcement officer. He was carrying several pieces of police equipment including a sidearm, taser, and two-way radio and he was wearing a bulletproof vest underneath his outer clothing. At some point, Johnson looked directly at Trooper Aye, said something to Nelson, and immediately walked out of the bank. Deputy Meeks observed Johnson exit the bank and stand at the driver’s side of the sedan. Johnson appeared to gesture to Brookins before getting into the back seat. Trooper Aye and Deputy Meeks communicated by cellular phone as to what each had just witnessed. Trooper Aye then left the bank and rejoined Deputy Meeks in the police vehicle. The officers decided to stop and question the men. They pulled behind the sedan and activated their emergency lights.
The officers approached the car and displayed their badges. They verbally identified themselves as law enforcement officers and asked for identification. Trooper Aye told Johnson and Brookins that the whole incident “might be a misunderstanding” and that they “just want[ed] to talk with [them].” The men cooperated with the officers’ request that they step out of the car. Deputy Meeks patted down Brookins and discovered a loaded .25 caliber handgun in his front pocket and a spare magazine in his back pocket. Deputy Meeks informed Trooper Aye, who was talking to Johnson, that he had found a gun. The officers then conducted a pat-down search of Johnson and located another semi-automatic pistol in his coat pocket. The officers handcuffed Johnson and Brookins and seated them on the curb. Nelson then emerged from the bank and walked toward the sedan with his hands in his pockets.
[998] Having already discovered that his associates were armed, the officers drew their own weapons and demanded that Nelson place his hands in plain view. After conducting a patdown frisk, which uncovered no additional firearms, the officers secured Nelson.
The officers explained to the three suspects that the matter still could be a misunderstanding, but they needed to run their identifications to determine whether they had any active warrants or other criminal history. At that point, Johnson volunteered that he had a previous drug conviction in Florida.1 Deputy Meeks and Trooper Aye contacted the Anchorage Police Department (“APD”), whose officers responded and took over the investigation.
On April 19, 2007, Johnson was indicted in the District of Alaska on a single count of being a felon in possession of a firearm, in violation of 18 U.S.C. §§ 922(g) and 924(a)(1). He was arrested soon thereafter in Miami, Florida, and transported to Anchorage where he was arraigned. Johnson initially pled not guilty. He filed a motion to suppress all evidence obtained as a result of the detention, including the pistol officers had found in his coat pocket. Johnson also notified the prosecution that he intended to plead guilty if his suppression motion was unsuccessful.
On October 1, 2007, a magistrate judge held an evidentiary hearing on the motion, at which both Deputy Meeks and Trooper Aye testified. After evaluating the evidence and witness testimony, the magistrate recommended denial of Johnson’s suppression motion, concluding that officers had reasonable suspicion that criminal activity might be afoot to detain Johnson for questioning and to conduct a patdown search. On November 19, 2007, the district court, over Johnson’s objections, adopted the magistrate’s recommendation in full and denied Johnson’s motion to suppress. On November 27, 2007, Johnson formally entered a conditional guilty plea, which reserved his right to appeal the denial of his suppression motion.
At sentencing, the government did not oppose a two-level reduction to Johnson’s offense level for acceptance of responsibility under United States Sentencing Guidelines (“Guidelines” or “U.S.S.G.”) § 3El.l(a), as recommended in the presentence investigation report. The government, however, declined to move for an additional one-level decrease under § 3El.l(b), citing Johnson’s decision to pursue the suppression issue on appeal. The district court, after considering the parties’ arguments, rejected Johnson’s argument that he should nonetheless be awarded the third-level adjustment because he timely pled guilty and thus permitted the government to avoid preparing for a trial. The court then sentenced Johnson to thirty months incarceration followed by three years of supervised release. This appeal followed.
II
Johnson first appeals the district court’s denial of his suppression motion, which we review de novo. See United States v. Bautista, 362 F.3d 584, 588-89 (9th Cir.2004). Whether there is reasonable suspicion to justify an investigatory stop is a mixed question of law and fact also reviewed de novo. See United States v. Hall, 974 F.2d 1201, 1204 (9th Cir.1992). We review factual findings for clear error. See United States v. Patayan Soriano, 361 F.3d 494, 501 (9th Cir.2004). Contrary to Johnson’s argument that the seizure of the firearm stemmed from a violation of his [999] Fourth Amendment rights, we think the record amply supported a “stop and frisk” under Terry v. Ohio, 392 U.S. 1, 88 S.Ct. 1868, 20 L.Ed.2d 889 (1968).
“The Fourth Amendment applies to all seizures of the person, including seizures that involve only a brief detention short of traditional arrest.” United States v. Enslin, 327 F.3d 788, 795 (9th Cir.2003) (quoting United States v. Brignoni-Ponce, 422 U.S. 873, 878, 95 S.Ct. 2574, 45 L.Ed.2d 607 (1975)). Police may detain or seize an individual for brief, investigatory purposes, provided the officers making the stop have reasonable suspicion “that criminal activity may be afoot.” United States v. Orman, 486 F.3d 1170, 1173 (9th Cir. 2007) (quoting Terry, 392 U.S. at 30, 88 S.Ct. 1868). If an officer reasonably suspects the individual may be armed and dangerous, the officer may “frisk” the person he has stopped to determine if the individual is carrying any weapons. United States v. Washington, 387 F.3d 1060, 1067 (9th Cir.2004) (citing Terry, 392 U.S. at 30, 88 S.Ct. 1868). This frisk is limited to a patdown of the exterior clothing. Id.
“Reasonable suspicion ‘is formed by specific, articulable facts which, together with objective and reasonable inferences, form the basis for suspecting that the particular person detained is engaged in criminal activity.’ ” United States v. Thompson, 282 F.3d 673, 678 (9th Cir. 2002) (quoting United States v. Rojas-Millan, 234 F.3d 464, 468-69 (9th Cir.2000)). “To determine whether reasonable suspicion existed, the court must consider the totality of the circumstances surrounding the stop.” Hall, 974 F.2d at 1204. This determination is made with reference to the “collective knowledge of the officers involved, and the inferences reached by experienced, trained officers.” Id. (quoting United States v. Sharpe, 470 U.S. 675, 682, 105 S.Ct. 1568, 84 L.Ed.2d 605 (1985)).
We first dispose of Johnson’s contention that his initial seizure amounted to an arrest and therefore required probable cause from the outset. He argues that he was under arrest from the moment officers activated their emergency lights, pulled their vehicle behind the parked sedan, and approached the car. Based on our review of the record, we disagree.2 The record reveals that Trooper Aye and Deputy Meeks identified themselves and simply asked to talk to Johnson and Brookins, who fully cooperated with the officers’ request that they exit their vehicle and submit to a frisk.
After finding weapons, the officers were justified in handcuffing Johnson and Brookins as they waited for the third suspect to emerge from the bank. See United States v. Bravo, 295 F.3d 1002, 1010-11 (9th Cir. 2002) (noting that, although handcuffing is a substantial factor in the determination, the totality of the circumstances remains the test for deciding whether a suspect was arrested or merely detained). Even after all three men were secured with handcuffs while the officers ran a background check, the officers repeatedly reassured the suspects that the detention might be nothing more than a misunderstanding and that its purpose was merely investigatory. Taken together, the circumstances of Johnson’s detention would lead a reasonable person to believe that he was free to leave once the officers conducted a brief inquiry and allayed their suspicions. See id. at 1011. The district court did not err in finding that Johnson was not [1000] under arrest, but rather merely detained, during the material time period.3
The investigatory stop and frisk was supported by reasonable suspicion on facts quite similar to those in Terry itself, where an alert detective suspected three men of casing a business for a possible robbery. The specific, articulable facts known to Deputy Meeks and Trooper Aye were more than sufficient to support their suspicion that Johnson and his associates were casing a bank for a potential robbery and not merely experiencing car trouble. When two of the individuals entered the bank, one flipped up the hood on his hooded sweatshirt, which could aid in concealing his identity. The third man remained outside, lowered the hood of the car, and sat in the driver’s seat. The two men inside the bank were seen whispering to one another while one appeared to surveil the lobby area. A visibly nervous bank employee told Trooper Aye that something was amiss in the bank. When one of the suspects became aware of Trooper Aye’s presence, he whispered something to his associate, left the bank, and returned to the sedan waiting outside. A trained law enforcement officer could reasonably suspect that these individuals might well be intending to rob the bank and flee in the waiting getaway car.
Given the nature of the suspected criminal activity, the officers were also justified in patting down Johnson. As Deputy Meeks testified, in his experience, “[a]l-most everybody has weapons” in Alaska. But here the officers suspected that a bank robbery was about to take place, which increased their suspicion that the men might be armed. Moreover, the suspects outnumbered the officers by three to two. Trooper Aye and Deputy Meeks were therefore justified, for their own safety, in conducting a patdown frisk of Brookins and Johnson to check for weapons. This is especially true in Johnson’s case. After Deputy Meeks first discovered a loaded pistol and an extra ammunition clip in Brookins’s possession, the officers had an even greater basis to suspect that Johnson might likewise be armed and that another patdown frisk was warranted for officer safety.
We are unmoved by Johnson’s efforts to provide innocent explanations for the conduct both outside and inside the bank. Whether this incident was indeed a foiled bank robbery attempt or a simple misunderstanding is not material to his suppression motion or this appeal. Applying a “totality of the circumstances” review of the facts then known to them, the officers possessed substantial information supporting a reasonable suspicion that criminal activity was afoot and that weapons might be involved. The investigatory stop and frisk of Johnson and the discovery of his semi-automatic handgun did not violate his Fourth Amendment rights. The district court properly denied his motion to suppress the evidence.
Ill
Under the Guidelines, a defendant who “clearly demonstrates acceptance [1001] of responsibility for his offense” is entitled to a two-level decrease in offense level. U.S.S.G. § 3El.l(a); see United States v. Espinoza-Cano, 456 F.3d 1126, 1133-34 (9th Cir.2006). Johnson received this reduction at sentencing. He challenges the district court’s refusal to grant him an additional one-level downward adjustment under § 3El.l(b) after the government declined to move for the extra reduction.4 A district court’s decision whether to reduce a defendant’s sentence for acceptance of responsibility is reviewed for clear error. Espinoza-Cano, 456 F.3d at 1130. A district court’s interpretation and application of the Guidelines are reviewed de novo. United States v. Becker, 919 F.2d 568, 570 (9th Cir.1990).
The Guidelines provide for, but do not mandate, an additional one-level reduction upon a motion by the government. Subsection (b) of § 3E1.1 states:
If the defendant qualifies for a decrease under subsection (a), the offense level determined prior to the operation of subsection (a) is level 16 or greater, and upon motion of the government stating that the defendant has assisted authorities in the investigation or prosecution of his own misconduct by timely notifying authorities of his intention to enter a plea of guilty, thereby permitting the government to avoid preparing for trial and permitting the government and the court to allocate their resources efficiently, decrease the offense level by 1 additional level.
U.S.S.G. § 3E1.1(b). As we have said, “the government’s discretion to file a motion under section 3E1.1(b) is ‘a power, not a duty.’ ” Espinoza-Cano, 456 F.3d at 1135 (quoting United States v. Moreno-Trevino, 432 F.3d 1181, 1186 (10th Cir.2005)). “[T]he government has been vested with broad discretion to determine when the § 3El.l(b) adjustment is appropriate.” United States v. Medina-Beltran, 542 F.3d 729, 731 (9th Cir.2008) (per curiam) (internal brackets omitted).
This discretion, however, is not limitless. Like many of our sister circuits, we have held that “a prosecutor is afforded the same discretion to file an acceptance of responsibility motion for a third-level reduction under section 3El.l(b) as that afforded for the filing of a substantial assistance motion under section 5K1.1.” Espinoza-Cano, 456 F.3d at 1136. A district court may review the government’s refusal to file a § 3E 1.1(b) motion and grant the additional one-level reduction sua sponte if it finds that the decision was (1) animated by an unconstitutional motive (e.g., racial discrimination), or (2) arbitrary — i.e., not rationally related to a legitimate governmental interest. Id.; see also Moreno-Trevino, 432 F.3d at 1185-86. The burden of showing unconstitutional motive or arbitrariness rests on the defendant. Espinoza-Cano, 456 F.3d at 1136.5
[1002] The government did not file a § 3El.l(b) motion for the third-level reduction, citing Johnson’s stated intention to appeal the suppression order. Accordingly, the issue before us is whether the allocation and expenditure of prosecutorial resources for the purposes of defending an appeal is a rational basis for declining to move for the third reduction point. We hold that it is. When § 3El.l(b) speaks of conserving government resources in the “prosecution” of the defendant’s “misconduct,” it means more than simply trial preparation. “Prosecution” is commonly understood to encompass the entirety of the criminal proceedings in a particular case until judgment is final and certain. The government has an interest in securing outright guilty pleas. A conditional plea does not provide finality to the matter, and the government must then allocate precious resources to the appeal. Time and personnel are not unlimited. Resources devoted to appeals are resources lost to prosecuting other cases.
In United States v. Espinoza-Cano, our circuit’s seminal case relating to the government’s discretion under § 3El.l(b), the defendant contended that he was entitled to the extra acceptance of responsibility reduction, despite the absence of a motion by the government, because he had stipulated to all the facts necessary to establish his guilt, thereby assisting in a manner that allowed the government to avoid preparing for trial. 456 F.3d at 1134. After establishing the proper standard applicable when the district court may act without a government motion, we rejected the defendant’s argument because the stipulated bench trial — which the district court dubbed a “semi-modified Rule 11 colloquy” or “slow plea,” id. at 1129 — still required the expenditure of resources. Id. at 1138. We explored the legitimate reasons that justified the government’s decision to withhold a § 3El.l(b) motion:
Even if we were to equate a stipulated bench trial with an outright guilty plea, the government still would not have been compelled to file the motion. There are rational reasons for the government to prefer an outright guilty plea to a stipulated bench trial. In particular, as the government urges, a plea of guilty allows the government to avoid expending resources “anticipating, and ultimately defending, a complete appeal.” As noted in Wade, “[t]he Government’s decision not to move may[be] [1003] based ... simply on its rational assessment of the cost and benefit that would flow from moving.”
Id. (quoting Wade v. United States, 504 U.S. 181, 187, 112 S.Ct. 1840, 118 L.Ed.2d 524 (1992)) (citation omitted).
While the particular facts of EspinozaCano are admittedly distinguishable from the conditional guilty plea in the instant case, the broad scope of the government’s discretion was established. Indeed, we applied Espinoza-Cano and reached the same conclusion in United States v. Medina-Beltran a case strikingly similar to ours. The defendant, having pled guilty to illegal reentry following deportation, appealed the district court’s refusal to grant him the third reduction point under § 3E1.1(b). Medina-Beltran, 542 F.3d at 731. We rejected his argument that the government had acted arbitrarily by declining to file the required motion, stating:
Although Medina-Beltran pled guilty and avoided a trial on the substantive offense, he objected to his sentencing enhancement and rejected the government’s proposed appeal waiver. The government anticipated and defended his appeal of his sentence. Under these circumstances, the government’s decision not to move for the additional level reduction was not arbitrary.
Id.6
Likewise, we conclude that the government here has presented an adequate reason for declining to file the discretionary motion — a reason that cannot fairly be characterized as arbitrary or based on an unconstitutional motive. Johnson’s guilty plea was conditional, and he made clear that he intended to continue to pursue a favorable suppression order on appeal. If successful, the basis for the federal charge would dissolve. As the government maintains, Johnson “has not ‘accepted responsibility in a way that ensures the certainty of his just punishment in a timely manner.’ ” United States v. Newson, 515 F.3d 374, 377 (5th Cir.2008) (quoting U.S.S.G. § 3E1.1 cmt. background).7 Avoiding the expenditure of additional resources in anticipation of and defending against an appeal is a legitimate governmental interest. See Medina-Beltran, 542 F.3d at 731; Espinoza-Cano, 456 F.3d at 1138. Quite clearly, the government’s proffered reason here is rationally related to this end. Because the government’s decision not to file a § 3El.l(b) motion was neither arbitrary nor based on an unconstitutional ground, the district court [1004] appropriately refused to grant Johnson the additional one-level reduction sua sponte.
We once again find support for our holding in our sister circuits, which have confronted similar challenges to the government’s broad discretion under § 3El.l(b). See, e.g., Espinoza-Cano, 456 F.3d at 1135-36 (relying heavily on out-of-circuit authority). In United States v. Blanco, 466 F.3d 916 (10th Cir.2006), for example, the Tenth Circuit approved the refusal to move for the additional reduction because, on the defendant’s motion, the government was forced to expend resources reweighing drug evidence at an independent testing facility. Id. at 918-19. The court held that this decision was neither unconstitutional nor arbitrary because “[ejnsuring efficient resource allocation is a legitimate government end and a stated purpose of § 3El.l(b).” Id. at 918; see also Moreno-Trevino, 432 F.3d at 1186-87 (finding appropriate the government’s refusal to file a § 3El.l(b) motion where the defendant, having timely pled guilty to illegal reentry after deportation, indicated that he intended to again reenter the country after his incarceration and removal, in violation of the terms of his plea agreement and supervised release); United States v. Sainz-Preciado, 566 F.3d 708, 715-16 (7th Cir. 2009) (“So while Sainz-Preciado’s early guilty plea spared the expense of a trial, the government still had to prepare ... testimony and other evidence to prove the full scope of Sainz-Preciado’s criminal conduct at the sentencing hearing. This added burden to both the government and the court system gave the government good reason (if it needed one) not to file a § 3El.l(b) motion.”).
The Fifth Circuit has similarly addressed the issue before us, rejecting virtually identical arguments by the defendant. In United States v. Newson, the case upon which we relied in Medina-Beltran, the defendant timely pled guilty to a drug possession charge. 515 F.3d at 375. The government declined to move for the discretionary one-level adjustment under § 3El.l(b) “solely because [the defendant] would not accept the appellate waiver provision in its proposed plea agreement.” Id. at 377. The defendant appealed his sentence, arguing that the government’s refusal was “irrational and punitive and not based on a legitimate governmental purpose” because the purpose of § 3El.l(b) was strictly “to prevent a waste of prosecutorial and judicial resources at the trial-court level.” Id. The government countered that § 3El.l(b) “encompass[es] not only the expenditure of the Government’s time and effort at the prejudgment stage but also in appellate or collateral review proceedings,” and that “conserving[governmental] resources in post-judgment proceedings serves a legitimate governmental interest.” Id. Applying the same standard that we apply, the Fifth Circuit sided with the government. Relying on our decision in Espinozar-Cano, the court concluded that “[t]he defendant’s refusal to waive his right to appeal is a proper basis for the Government to decline to make such a motion, as it is rationally related to the purpose of the rule and is not based on an unconstitutional motive.” Id. at 378. We think the reasoning of the Fifth Circuit is sound.8
Johnson’s argument on appeal focuses almost exclusively on the timeliness of the [1005] plea — and, not the nature of his conditional guilty plea or the governmental interests at stake. This position misses the mark, as it “ignores the principle that a defendant’s fulfillment of the conditions for a motion for an adjusted offense level is necessary, but does not mandate relief.” Espinoza-Cano, 456 F.3d at 1136; see also Wade, 504 U.S. at 187, 112 S.Ct. 1840 (“[Ajlthough a showing of assistance is a necessary condition for relief [under § 5K1.1], it is not a sufficient one. The Government’s decision not to move may have been based not on a failure to acknowledge or appreciate Wade’s help, but simply on its rational assessment of the cost and benefit that would flow from moving.”). In support, Johnson heavily relies on United States v. Vance, 62 F.3d 1152 (9th Cir.1995), and other decisions by our court and other circuits that considered a prior version of § 3E1.1 that materially differs from the current version applicable in this case.
Before April 2003, the decision to award the third-level reduction for acceptance of responsibility was non-discretionary and lay in the hands of the district court — a “factual determination reviewed for clear error.” United States v. Blanco-Gallegos, 188 F.3d 1072, 1076 (9th Cir.1999). Section 3El.l(b) formerly read:
If the defendant qualifies for a decrease under subsection (a), the offense level determined prior to the operation of subsection (a) is level 16 or greater, and the defendant has assisted authorities in the investigation or prosecution of his own misconduct by taking one or more of the following steps:
(1) timely providing complete information to the government concerning his own involvement in the offense; or
(2) timely notifying authorities of his intention to enter a plea of guilty, thereby permitting the government to avoid preparing for trial and permitting the court to allocate its resources efficiently,
decrease the offense level by 1 additional level.
U.S.S.G. § 3El.l(b) (2002). Thus, when we decided Vance, a defendant was entitled to “a third level reduction either for providing information to the government regarding his own involvement or by timely notifying the government of his intent to plead guilty.” Espinoza-Cano, 456 F.3d at 1134. The “key inquiry” under the old version of § 3El.l(b) was simply “whether the confession was complete and timely.” Blanco-Gallegos, 188 F.3d at 1077.
The Prosecutorial Remedies and Other Tools to End the Exploitation of Children Today Act of 2003 (“PROTECT Act”), Pub.L. No. 108-21, § 401(g), 117 Stat. 650, 671-72 (2003), materially altered § 3El.l(b).9 Notably, it made “the third [1006] level reduction subject to the discretion of the government, rather than mandatory, upon a timely plea of guilty.” Espinoza-Cano, 456 F.3d at 1137. Further, the PROTECT Act expressly inserted consideration of the government’s resources into the calculus. Under the post-PROTECT Act version of § 3E 1.1(b), the government must file a motion stating that the defendant’s timely notification of an intent to plead guilty not only “permitt[ed] the government to avoid preparing for trial,” but also “permitt[ed] the government and the court to allocate their resources efficiently.” U.S.S.G. § 3El.l(b) (2006) (emphasis added). Both of these changes are significant. As a result, Vance does not govern here.10 Simply put, Johnson, by relying exclusively on pre-PROTECT Act authorities, fails to account for the government’s broad discretion whether to file a § 3E 1.1(b) motion, which we have confirmed in Espinozar-Cano and MedinaBeltran,11
We acknowledge that the government’s broad discretion to move for the third-level reduction under § 3El.l(b) might in some eases place defendants in a dilemma. See Blanco, 466 F.3d at 919 (“[The defendant] enjoyed the right to insist on reweighing the drugs, and he could exercise that right in one of two ways: by reweighing the drugs or by waiving that right in exchange for a lower sentence.”); see generally United States v. Ensminger, 567 F.3d 587, 593 (9th Cir.2009) (noting the defendant’s informed choice to forgo available defense strategies by entering a guilty plea). But, Johnson has no legal entitlement to the discretionary one-level reduction for acceptance of responsibility. As we have stated time and again, “there is nothing improper about the government providing an incentive to plea bargain.” Espinoza-Cano, 456 F.3d at 1138; see also United States v. Baldrich, 471 F.3d 1110, 1115 (9th Cir.2006) (rejecting challenge that “section 3E 1.1(b) is unconstitutional [1007] because it penalizes defendants for exercising their constitutional right to go to trial”).12 Johnson elected to bring his suppression argument to us, delaying finality of this criminal prosecution and causing the government to allocate and expend substantial additional resources to defend this appeal. The district court correctly concluded that the government acted within its discretion when it refused to file a § 3E 1.1(b) motion.
IV
The officers had reasonable suspicion to conduct an investigatory stop and frisk of Johnson, and, as a result, the district court did not err in denying his motion to suppress. The district court also properly declined Johnson’s request for the discretionary one-level adjustment for acceptance of responsibility under § 3El.l(b).
AFFIRMED.