As we continue building a working command of the constitutional standards governing use of force, we now turn to the cases that define vehicle pursuits, roadblocks, PIT maneuvers, and deadly force involving vehicles. These decisions shape how officers may use force to stop fleeing suspects, how courts evaluate seizures involving vehicles, and what constitutes a Fourth Amendment seizure during vehicular encounters.

Unlike correctional environments, pursuit and vehicle‑related force cases are evaluated primarily under the Fourth Amendment’s objective reasonableness standard. These rulings directly influence PIT policies, roadblock design, ramming techniques, and the legal consequences of shots fired at moving vehicles.

While the focus remains on U.S. Supreme Court precedent, remember that state law, state constitutions, and agency policy may be more restrictive. Supreme Court decisions establish the constitutional minimum, not the operational standard. This series is not ranked or ordered by importance. Every case matters. Every case is foundational. A summary is provided here, but officers and supervisors should read the full opinions to understand the facts, reasoning, and holdings.

Understanding these rulings is essential for patrol officers, supervisors, and command staff responsible for pursuit oversight, policy development, and post‑incident review.

21. Brower v. County of Inyo, 489 U.S. 593 (1989)

Fact Pattern Deputies set up a tractor‑trailer roadblock on a dark highway to stop a fleeing suspect. The suspect crashed into the roadblock and died. The question was whether this constituted a Fourth Amendment seizure.

Rule A roadblock intentionally placed to stop a suspect is a Fourth Amendment seizure. A seizure occurs when officers intentionally apply means to terminate movement. Accidental or unintended stops do not qualify.

Why It Matters Brower defines what constitutes a seizure during vehicle interdiction. Any intentional roadblock, ramming, or physical barrier designed to stop a vehicle is a seizure and must be objectively reasonable. This case underpins modern pursuit‑termination tactics and roadblock policies.

22. Brendlin v. California, 551 U.S. 249 (2007)

Fact Pattern During a traffic stop, officers discovered contraband on a passenger. The passenger argued he was unlawfully seized and therefore had standing to challenge the stop.

Rule Passengers are seized during a traffic stop for Fourth Amendment purposes. The stop restrains the liberty of all occupants, not just the driver.

Why It Matters Brendlin expanded the definition of seizure in vehicle encounters. Officers must consider the rights and safety of every occupant when using force, ordering compliance, or conducting high‑risk vehicle stops. This case affects pursuits ending in force, vehicle extractions, and multi‑occupant threat assessments.

23. Scott v. United States, 436 U.S. 128 (1978)

Fact Pattern While this is not a “Use of Force” case per se, it does deal with the objective reasonableness of search and seizure. The Court reviewed whether an officer’s subjective intent or alleged bad faith mattered when evaluating the legality of a search and seizure.  This case involved a court-authorized wiretap during a narcotics investigation in which federal agents intercepted numerous phone calls, including many that were not relevant to the criminal activity under investigation.

Rule Fourth Amendment analysis is governed by objective reasonableness, not officer intent. Subjective motives, whether good or bad, are irrelevant if the actions are objectively lawful.

Why It Matters Scott provides a foundation for modern objective reasonableness analysis later applied in Graham v. Connor. For pursuits and vehicle‑related force, the officer’s internal motivations do not matter; what matters is whether the force used was objectively reasonable under the circumstances.

24. United States v. Sharpe, 470 U.S. 675 (1985)

Fact Pattern Officers conducted an investigative stop that became prolonged due to coordination between multiple units. While again this is not a case that deals with physical force, rather the “force” is the detention. The suspect argued the delay transformed the stop into an unlawful seizure.

Rule Investigative detentions must be diligently pursued. Excessive or unnecessary delay can render a stop unconstitutional. Officers must act reasonably and efficiently. In this case, the Court upheld the stop.   It found the officers acted reasonably because they were actively investigating and coordinating efforts, not delaying unnecessarily. A detention can last longer than a few minutes and still be constitutional, as long as officers are working efficiently and the delay is justified by the circumstances.

Why It Matters Sharpe governs the duration of vehicle stops and pursuit‑related detentions. If a stop becomes unnecessarily prolonged, any force used during or after that delay may be deemed unlawful. Supervisors must ensure that investigative stops, felony stops, and pursuit terminations are handled promptly and professionally. Documentation of why a stop is prolonged is key in such instances.

25. Torres v. Madrid, 141 S. Ct. 989 (2021)

Fact Pattern Officers shot a fleeing suspect who then drove away. The suspect later sued, arguing she had been seized even though she escaped. The question was whether physical force that fails to stop a suspect still constitutes a seizure.

Rule A seizure occurs when officers apply physical force with intent to restrain, even if the suspect escapes. The success of the restraint is irrelevant.

Why It Matters Torres significantly expanded seizure doctrine. Any intentional application of force-such as shooting at a moving vehicle-constitutes a seizure, even if the suspect continues fleeing. This ruling increases exposure to civil liability in vehicle‑related shootings and clarifies when a Fourth Amendment seizure begins.  It should be noted that Torres does not reject the previously mentioned (in a past article in this series) California v. Hodari D 499 U.S. 621 (1991)..  Instead, it builds on Hodari D. by splitting its rule into two paths: 1) Physical force = seizure (even if unsuccessful escape follows) , 2) Submission = seizure (if no force is used) Torres explicitly relies on Hodari D. but narrows and refines it, especially by confirming that an attempted physical restraint can itself be a Fourth Amendment seizure even if the suspect gets away

Parting Thoughts (Part 5)

These five cases define the constitutional limits of force during pursuits and vehicle encounters. They clarify:

• What constitutes a seizure during roadblocks, ramming, and vehicle interdiction

• That passengers are seized and must be considered in force decisions

• That objective reasonableness—not officer intent—governs Fourth Amendment analysis

• How delays during stops can render force unlawful

• That physical force is a seizure even when the suspect escapes

For supervisors and command staff, the operational takeaway is clear: pursuit‑related force must be justified, proportional, and grounded in objective reasonableness. These cases shape pursuit policy, PIT authorization, roadblock design, and post‑incident review for every agency engaged in vehicle enforcement operations.

The next article (cases 26–30) will examine Medical Care and Restraint-a critical area for patrol, training, and command oversight.