Article 4 of 12 in Landmark US Decisions on Law Enforcement Encounters

Brendlin v. California (2007) - When the Passenger Is Seized Too

Citation:: 551 U.S. 249 (2007)
Court:: United States Supreme Court
Published:: May 18, 2026
Last updated:: May 18, 2026

traffic-stops
seizure
fourth-amendment
passengers

On this page

Quick Reference
The Facts of the Case
The Legal Question
The Court's Reasoning
The Holding and Its Standard
How Courts Have Applied This Since
What This Means for Officers Today
Common Misunderstandings
CodeBlu Training Connection
Further Reading
Important Disclaimer

Quick Reference

Citation: Brendlin v. California, 551 U.S. 249 (2007)
Court: Supreme Court of the United States
Year Decided: 2007
Key Question: When police stop a car, is the passenger "seized" under the Fourth Amendment, or only the driver?
Holding: A passenger in a vehicle stopped by police is seized for Fourth Amendment purposes and may therefore challenge the constitutionality of the stop.
Why It Matters for Officers: From the moment a traffic stop begins, every occupant of the vehicle, not just the driver, is legally detained and has standing to contest the stop in court. The legal status of a passenger is not an afterthought.

The Facts of the Case

On the morning of November 27, 2001, two deputies from the Yuba County, California, Sheriff's Department were patrolling in Sutter County. One deputy noticed a parked Buick with expired registration tags. He had already learned that the car's registration renewal application was being processed, so the expired tags alone did not establish a violation. (Brendlin v. California, 551 U.S. 249, 251 (2007), https://supreme.justia.com/cases/federal/us/551/249/.)

Later that morning, the deputies saw the same Buick on the road. One deputy decided to pull the car over to verify whether the temporary operating permit matched the vehicle, even though, as the deputy later admitted, "there was nothing unusual about the permit or the way it was affixed." The deputy signaled the driver to stop, and the driver complied. (551 U.S. at 251.)

The driver was Karen Simeroth. The front-seat passenger was Bruce Brendlin. When the deputy approached and looked into the car, he recognized Brendlin as "one of the Brendlin brothers" and recalled that one of them had recently absconded from parole supervision. The deputy returned to the patrol car, confirmed by radio that Brendlin was a parole violator subject to an outstanding warrant, and then ordered Brendlin out of the vehicle at gunpoint. (551 U.S. at 252.)

After taking Brendlin into custody on the warrant, the deputies searched him, searched Simeroth, and searched the car. The searches turned up an orange syringe cap on Brendlin's person, materials used to produce methamphetamine in the passenger compartment, and tooling consistent with drug manufacturing. Brendlin was charged with possession and manufacture of methamphetamine. (551 U.S. at 252.)

Brendlin moved to suppress the evidence, arguing that the deputies had unlawfully seized him when they stopped the car without reasonable suspicion or probable cause, and that the evidence flowed from that unlawful seizure. The prosecution did not seriously defend the legality of the initial stop; instead, it argued that Brendlin, as a mere passenger, was not "seized" until the deputy ordered him out of the car at gunpoint, and therefore could not benefit from any illegality in the original stop. (551 U.S. at 252-253.)

The California trial court denied the suppression motion. The California Court of Appeal reversed, but the California Supreme Court reinstated the conviction, holding that a passenger is not seized as a constitutional matter merely because the car he occupies is pulled over. The United States Supreme Court granted certiorari to resolve a split among state and federal courts on exactly that question. (551 U.S. at 253.)

The Legal Question

The Fourth Amendment protects "the right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures." A person can only invoke that protection, and seek suppression of evidence, if that person was personally seized or searched in violation of the amendment. This is sometimes loosely called "standing," though the Court has explained the concept is really about whose rights were violated.

The narrow question in Brendlin was deceptively simple: when an officer pulls over a car, is the passenger seized at the moment the car stops, or only later if and when the officer takes some additional action directed at the passenger specifically?

The stakes were practical. If a passenger is not seized by the stop itself, then a passenger generally cannot challenge an unlawful stop, and evidence found as a result of that stop could be used against the passenger even though it could not be used against the driver. State and federal courts had divided sharply. Some courts held that the passenger is seized along with the driver because no reasonable passenger would feel free to leave a car that police have just pulled over. Other courts, including the California Supreme Court below, held that a stop is directed at the driver, and that a passenger is only "incidentally" affected and remains free, in a legal sense, until police single the passenger out. (See 551 U.S. at 254-255.)

The answer depended on how the Court applied its long-standing test for what counts as a seizure of a person. That test traces back to United States v. Mendenhall, 446 U.S. 544 (1980), and was refined in California v. Hodari D., 499 U.S. 621 (1991). The foundational definition of a Fourth Amendment seizure, including the requirement of an intentional, governmental termination of freedom of movement, comes from Brower v. County of Inyo, 489 U.S. 593 (1989) (see also our analysis of Brower v. County of Inyo).

The Court's Reasoning

The Supreme Court reversed the California Supreme Court, ruling unanimously in an opinion by Justice Souter.

The Court began with the settled definition of a seizure of a person. A seizure occurs "when there is a governmental termination of freedom of movement through means intentionally applied." (551 U.S. at 254, quoting Brower v. County of Inyo, 489 U.S. 593, 597 (1989) (emphasis in original).) Where the person does not physically flee, the test is whether, considering all the circumstances, "a reasonable person would have believed that he was not free to leave," or, as later refined for situations involving a request rather than a show of force, whether a reasonable person "would feel free to decline the officers' requests or otherwise terminate the encounter." (551 U.S. at 255, citing United States v. Mendenhall, 446 U.S. 544, 554 (1980), and Florida v. Bostick, 501 U.S. 429, 436 (1991).)

Applying that test, the Court found the answer plain. "When a police officer makes a traffic stop, the driver of the car is seized within the meaning of the Fourth Amendment. The question in this case is whether the same is true of a passenger. We hold that it is." (551 U.S. at 251.)

The Court reasoned that any reasonable passenger would understand the officer's show of authority to be directed at the car and everyone in it. "We think that in these circumstances any reasonable passenger would have understood the police officers to be exercising control to the point that no one in the car was free to depart without police permission." (551 U.S. at 257.) A traffic stop, the Court emphasized, "necessarily curtails the travel a passenger has chosen just as much as it halts the driver." (551 U.S. at 257.)

The Court also rejected the idea that a passenger would feel free to simply get out and walk away. "An officer who orders one particular car to pull over acts with an implicit claim of right based on fault of some sort, and a sensible person would not expect a police officer to allow people to come and go freely from the physical focal point of an investigation into faulty behavior or wrongdoing." (551 U.S. at 257.) Indeed, the Court noted, a passenger who attempted to leave might well prompt the officer to investigate further or to order the passenger to stay. (551 U.S. at 257-258.)

Finally, the Court observed that this rule serves the deterrent purpose of the exclusionary rule. Holding that passengers are not seized "would invite police officers to stop cars with passengers regardless of probable cause or reasonable suspicion of anything illegal," because the officers would know that the passenger could not later challenge the stop. (551 U.S. at 263.)

The Holding and Its Standard

The holding is concise: a passenger in a vehicle subjected to a traffic stop is seized within the meaning of the Fourth Amendment from the moment the vehicle comes to a halt at the officer's direction. As a result, a passenger has standing to challenge the constitutionality of the stop itself and to seek suppression of evidence that is the fruit of an unlawful stop.

The standard officers should take from Brendlin is this: a traffic stop seizes everyone in the car. The legal detention does not begin when an officer turns attention to a specific passenger; it begins when the car stops. The Court framed this in terms of the reasonable-person test: under all the circumstances of an ordinary traffic stop, no reasonable occupant, driver or passenger, believes they are free to leave or to terminate the encounter without police permission.

Brendlin did not decide whether the stop of Simeroth's car was actually unlawful; the California courts had not finally resolved that, and the prosecution had largely conceded the point. The Court remanded for that determination. (551 U.S. at 263.) The holding is about who may raise the question, not about who wins it.

It is worth being precise about what Brendlin does and does not say. It says a passenger is seized by the stop. It does not say every subsequent interaction with that passenger is automatically lawful or unlawful. The scope of what officers may do with passengers during a lawful stop is governed by other cases, discussed below.

How Courts Have Applied This Since

Brendlin slotted into a line of cases steadily clarifying officers' authority over, and obligations toward, vehicle occupants.

On officer authority, the Court had already held in Pennsylvania v. Mimms, 434 U.S. 106 (1977), that an officer may order the driver out of a lawfully stopped car as a matter of course, and in Maryland v. Wilson, 519 U.S. 408 (1997), that the same authority extends to ordering passengers out of the car. Brendlin is the natural companion to Wilson: if officers may control passengers' movements during a stop, it follows that passengers are seized during the stop. (See Maryland v. Wilson, 519 U.S. 408, 414-415 (1997), https://supreme.justia.com/cases/federal/us/519/408/.)

The year after Brendlin, in Arizona v. Johnson, 555 U.S. 323 (2009), the Court relied directly on Brendlin to hold that a passenger lawfully stopped along with the car may be subjected to a Terry frisk if the officer has reasonable suspicion that the passenger is armed and dangerous. The Court explained that "a passenger is seized, just as the driver is, from the moment a car stopped by the police comes to a halt on the side of the road." (Arizona v. Johnson, 555 U.S. 323, 332 (2009), https://supreme.justia.com/cases/federal/us/555/323/.) Johnson connects Brendlin to the Terry doctrine (see also our analysis of Terry v. Ohio).

More recently, in Rodriguez v. United States, 575 U.S. 348 (2015), the Court held that a traffic stop may not be prolonged beyond the time reasonably required to handle the matter that justified the stop, absent independent reasonable suspicion. Because passengers are seized for the duration of the stop, the timing limits in Rodriguez protect passengers as well as drivers. (Rodriguez v. United States, 575 U.S. 348, 354-357 (2015), https://supreme.justia.com/cases/federal/us/575/348/.)

Lower courts have applied Brendlin broadly. They have generally extended its logic to passengers in stopped vehicles regardless of vehicle type, and have treated the moment of the stop as the start of the seizure for all occupants. Courts have continued to litigate harder questions Brendlin did not resolve, such as exactly when a lawfully stopped passenger becomes free to leave, and whether and when officers may detain a passenger who wishes to walk away from a stop that does not concern that passenger. Outcomes on those points vary by jurisdiction.

What This Means for Officers Today

For training purposes, the central lesson of Brendlin is a mindset, not a tactic: when you stop a car, you have detained every person inside it. The passenger is not a bystander. The passenger is a seized person whose constitutional interests are engaged from the first moment.

Several practical training implications follow:

First, the legal foundation for the stop matters for everyone in the car. If the stop is unlawful, every occupant, including passengers, may be able to challenge it and suppress resulting evidence. A weak or pretextual basis for a stop is not a problem confined to the driver.

Second, passengers are people the officer is communicating with, whether or not the officer says a word to them. A passenger watching an officer approach is experiencing a detention. How an officer manages the tone, pace, and clarity of the encounter shapes the experience of every occupant.

Third, officer-safety practices regarding passengers, such as asking passengers to keep their hands visible or ordering them out of the vehicle under Maryland v. Wilson, are exercises of authority over already-seized persons. Recognizing that the passenger is seized does not diminish officer-safety authority; it simply names the legal reality accurately.

This is educational framing, not legal advice. Brendlin tells officers something true about the legal status of the people in front of them. It does not tell officers how to handle any particular stop. Agency policy and agency counsel govern that.

Common Misunderstandings

"The passenger isn't really part of the stop." This is the exact argument the prosecution made and the Supreme Court unanimously rejected. The passenger is seized from the moment the car stops.

"Brendlin means the passenger is free to leave." No. Brendlin holds the opposite: a reasonable passenger does not feel free to leave a stopped car. Brendlin establishes that passengers are detained, which is why they have standing to challenge the stop. Whether and when a passenger may later be released or permitted to walk away is a separate question Brendlin did not resolve.

"Brendlin makes it harder to deal with passengers." It does not change officer authority over passengers at all. Mimms and Wilson already allowed officers to order occupants out of a lawfully stopped car. Brendlin addresses standing, that is, who may go to court, not what officers may do at the roadside.

"If the stop was unlawful, the passenger automatically wins." Not automatically. Brendlin gives the passenger the right to raise the challenge. Whether evidence is suppressed still depends on whether the stop was actually unlawful and on doctrines such as attenuation, inevitable discovery, and the existence of an intervening valid arrest warrant.

"Brendlin only applies to traffic stops." Its reasoning is rooted in the general seizure test and can apply wherever police make a comparable show of authority directed at a group. The case arose from a traffic stop, but the reasoning about reasonable perception of detention is not formally limited to cars.

CodeBlu Training Connection

CodeBlu is an AI-powered voice-scenario de-escalation and crisis-intervention training product. It does not teach search-and-seizure law, and it does not train use-of-force decision-making. Brendlin is relevant to CodeBlu not as a piece of law to be memorized, but because it accurately describes the legal status of the people inside a CodeBlu traffic-stop scenario.

When a CodeBlu scenario places an officer at the window of a stopped vehicle, Brendlin confirms what the scenario already assumes: every occupant is a detained person. That has direct bearing on the Communication and Empathy dimensions of the CodeBlu after-action review (AAR). A passenger who has said nothing is still a person experiencing a detention, still a person whose stress and uncertainty the officer can either escalate or reduce. An officer who communicates only with the driver and treats passengers as scenery is missing people who are, in legal fact, just as detained. The AAR's Empathy score reflects whether the officer recognized and responded to every person in the encounter, not only the one holding the steering wheel.

Brendlin also illuminates the AAR's Safety dimension. The Court describes the traffic stop as the moment officers exercise control such that "no one in the car was free to depart." That moment, the initiation of the stop, is precisely where a CodeBlu scenario's Safety considerations begin. The seizure is already in effect; the question the scenario explores is how the officer manages the human dynamics of that seizure before anything escalates.

CodeBlu scenarios are designed to resolve before force becomes the question. Brendlin sits comfortably inside that boundary: it is about communication, status, and perception at the start of an encounter, not about force. CodeBlu is not partnered with, certified by, or endorsed by any of the organizations whose public work informs its design.

Important Disclaimer

This article is an educational resource produced for law enforcement training purposes. It is not legal advice. The summaries and interpretations here are general and may not reflect the law of every jurisdiction or the most recent developments. Court decisions are fact-specific, and constitutional doctrine evolves. Officers and agencies should rely on their own legal counsel, current agency policy, and up-to-date jurisdiction-specific authority for any operational or legal decision. Nothing in this article creates a standard of conduct, and nothing here should be treated as a substitute for formal legal training or advice.