Police Use of Force Standard: Reasonableness, Deadly Force, and Immunity

The police use of force standard in the United States is “objective reasonableness,” a Fourth Amendment test the Supreme Court set out in Graham v. Connor (1989). Under that test, any force an officer uses during an arrest, stop, or other seizure is measured against what a reasonable officer would have done facing the same circumstances. It is not a perfection standard. It accounts for the reality that officers often act under pressure with incomplete information, while still drawing a constitutional line that reckless or disproportionate force crosses.¹

Why the Fourth Amendment Governs

Every use of force by a law enforcement officer against a person counts as a “seizure” under the Fourth Amendment, which prohibits unreasonable seizures. That means any physical force applied during an encounter has to clear a constitutional reasonableness test, whether it is a wrist grab during a traffic stop or a firearm discharge during a foot chase.² If the force was unreasonable, it violated the Constitution.

Before 1989, courts used inconsistent tests for excessive force claims. Some applied a “shocks the conscience” standard rooted in the Fourteenth Amendment’s due process clause. Graham v. Connor settled the question by holding that excessive force claims arising from arrests, investigative stops, and other seizures must all be analyzed under the Fourth Amendment’s objective reasonableness standard.¹

What “Objective Reasonableness” Means

The word “objective” does the heavy lifting. A court does not ask whether the officer had good intentions or bad ones. It asks whether a reasonable officer facing the same situation would have used the same type and amount of force. The evaluation is made from the perspective of an officer on scene at the time, not from the comfort of a courtroom months later.³ The Court specifically warned against judging these encounters with “20/20 hindsight.”

The Court also acknowledged that officers regularly face situations that are tense, uncertain, and fast-moving. Hesitation in those moments can be dangerous, and perfect judgment is unrealistic. This is sometimes called the “split-second judgment” doctrine, and it gives officers reasonable latitude when they make force decisions under genuine pressure.¹ That latitude protects reasonable mistakes. It does not protect reckless or disproportionate responses.

The Factors Courts Weigh

The Graham decision identified three factors courts should consider when deciding whether an officer’s force was reasonable. They are not a checklist with equal weight. They are starting points in a broader analysis, and not every factor applies in every case.⁴

Severity of the crime. An officer responding to an armed robbery has more justification for using significant force than one handling a minor traffic violation.³
Immediate threat to safety. This is widely considered the most important factor. Courts look for specific indicators of danger such as a visible weapon, aggressive movement toward the officer, or verbal threats, rather than a vague sense of unease.⁴
Active resistance or flight. Someone actively fighting an officer or sprinting from a lawful arrest creates different justifications than someone who is passively noncompliant or simply standing still.³

These three are not the whole analysis. The Court framed the inquiry as the “totality of the circumstances,” meaning judges can consider anything relevant to the encounter.³ In practice, courts also look at the number of officers present versus the number of suspects, whether the person appeared to be mentally impaired or in medical distress, the size disparity between officer and suspect, and whether less forceful alternatives were available. No single factor is decisive. A suspect who committed a serious felony but is handcuffed and compliant does not justify a beating. Context runs the analysis.

How Events Before the Force Fit In

For years, some lower courts adopted a “moment of threat” approach that evaluated only the instant an officer pulled the trigger or struck the blow, ignoring what led up to it. The Supreme Court rejected that narrow frame in Barnes v. Felix (2025), unanimously holding that the totality-of-the-circumstances inquiry “has no time limit” and includes any relevant events before the use of force.⁵ An officer who needlessly escalated a calm situation before using force cannot defend the final act in isolation.

That ruling reinforced a trend already underway in police department policy. A large and growing number of the nation’s biggest police departments now require officers to attempt de-escalation before resorting to force: slowing the encounter down, creating distance, communicating, and calling for backup when time permits. These departmental mandates go further than the Constitution requires. The federal standard asks whether the force was reasonable; many department policies ask whether it was necessary. When an officer skips available de-escalation options, that failure becomes part of the totality analysis.

The Department of Justice’s own use-of-force policy reflects the shift. DOJ officers must be trained in de-escalation and are expected to use those techniques before resorting to force whenever feasible.⁶ That policy directly binds only federal law enforcement, but it signals the direction of professional standards nationally.

The Higher Bar for Deadly Force

Deadly force triggers a much higher bar. In Tennessee v. Garner (1985), the Supreme Court held that an officer may use lethal force only when there is probable cause to believe the suspect poses a significant threat of death or serious physical injury to the officer or others.⁷ Without that specific level of danger, pulling the trigger violates the Fourth Amendment.

Before Garner, many jurisdictions followed a centuries-old common law rule that allowed officers to shoot any fleeing felon. The Court struck that down. As the opinion put it, “It is not better that all felony suspects die than that they escape.”⁷ A person running from a property crime or other nonviolent felony cannot be shot simply to prevent escape. The officer must be able to articulate a specific, demonstrable threat of violence, and that articulation often decides post-incident reviews and criminal trials.

Neck Restraints

The Department of Justice classifies chokeholds and carotid restraints as deadly force techniques. A chokehold compresses the throat and blocks breathing. A carotid restraint cuts blood flow to the brain. Under DOJ policy issued in 2021, federal law enforcement officers and federal task force members are prohibited from using either technique unless the situation meets the standard for deadly force, meaning the officer reasonably believes the subject poses an imminent danger of death or serious physical injury.⁸ Many state and local departments have adopted similar or stricter prohibitions, with some banning neck restraints outright regardless of the threat level.

The Use-of-Force Continuum

Most police departments train officers using some version of a use-of-force continuum, a hierarchical framework that matches the level of force to the level of resistance. The National Institute of Justice describes the continuum as an escalating series of options, with officers expected to respond at a level proportional to the situation they face.⁹ The levels generally progress like this:

Officer presence. No force used; the officer’s visible authority is often enough to resolve minor situations.
Verbal commands. Calm instructions that may become more direct if the person does not comply.
Empty-hand control. Physical techniques ranging from guiding holds and joint locks to strikes, depending on the resistance encountered.
Less-lethal tools. Pepper spray, batons, conducted energy devices such as Tasers, and similar equipment designed to incapacitate without killing.
Lethal force. Firearms or other measures used only when someone poses a serious threat of death or grave injury.⁹

The continuum is a training tool, not a rigid legal requirement. Officers do not have to start at the bottom and work up. Someone who lunges at an officer with a knife justifies an immediate jump to lethal force. The continuum’s real value is in framing proportionality. It helps officers and reviewers recognize when a response was wildly out of proportion to the threat.

Related Duties: Intervene and Render Aid

Officers do not just have obligations about their own use of force. A growing legal consensus holds that officers have an affirmative duty to stop a fellow officer from using excessive force when they are in a position to do so. The DOJ’s policy is explicit: officers “must recognize and act upon the affirmative duty to intervene to prevent or stop” another officer from using excessive or unconstitutional force.⁶ An officer who stands by and watches a colleague beat a compliant suspect can face the same liability as the officer throwing the punches.

After force is used, officers also have a duty to get medical help to injured people. The constitutional floor requires officers to promptly summon paramedics or take the person to a hospital. Departmental policies vary. Some require officers to personally administer first aid within the scope of their training; others only mandate calling for medical services. Ignoring a person’s obvious medical distress after using force can independently violate the Constitution.

How the Standard Is Enforced

When an officer crosses the constitutional line, the injured person can file a federal civil rights lawsuit under 42 U.S.C. § 1983. That statute allows anyone whose constitutional rights were violated by a government actor to sue for damages.¹⁰ A successful claim requires showing that the officer was acting in an official capacity and that the force used was objectively unreasonable under Graham. Damages can include medical costs, lost income, pain and suffering, and in egregious cases, punitive damages.

Qualified Immunity

Even when force was objectively unreasonable, officers have a powerful legal shield. Qualified immunity protects government officials from personal liability in civil lawsuits unless their conduct violated a “clearly established” constitutional right.¹¹ “Clearly established” is a demanding standard. It typically requires the plaintiff to identify an existing court decision with facts similar enough that any reasonable officer would have known the conduct was unlawful.

Courts apply a two-part analysis, established in Saucier v. Katz (2001) and later made flexible by Pearson v. Callahan (2009). The first question is whether the officer’s conduct actually violated a constitutional right. The second is whether that right was clearly established at the time. Courts can address these questions in either order, and often skip the first by ruling that the right was not clearly established, which ends the case without ever deciding whether the force was unconstitutional.¹²

This is where most excessive force lawsuits die. An officer who used plainly unreasonable force can still escape civil liability if no prior case in that jurisdiction involved sufficiently similar facts.

Federal Criminal Prosecution

Officers who use excessive force can also face federal criminal charges. Under 18 U.S.C. § 242, it is a crime for anyone acting under government authority to willfully deprive a person of their constitutional rights. The key word is “willfully.” Prosecutors must prove the officer intentionally used more force than allowed, not just that the officer made a mistake. Penalties scale with the harm caused: up to one year in prison for the base offense, up to ten years if bodily injury results or a dangerous weapon was used, and up to life or the death penalty if death results.¹³ Federal criminal prosecution of officers is relatively rare. The willfulness requirement sets a high bar.

When the Standard Does Not Apply

The Graham standard governs force used during an arrest, stop, or other seizure. If the person is already a pretrial detainee in custody, excessive force claims arise under the Fourteenth Amendment instead. The Supreme Court held in Kingsley v. Hendrickson (2015) that pretrial detainees need only show the force used was objectively unreasonable; they do not have to prove the officer acted with a subjective intent to harm.¹⁴ The evaluation still considers the perspective of a reasonable officer, but the plaintiff’s burden is somewhat lighter than in cases involving convicted prisoners.

State Standards Can Be Stricter

The Supreme Court’s standards represent a constitutional floor, not a ceiling. States are free to impose stricter requirements, and many have. A growing number of jurisdictions have moved from asking whether force was “reasonable” to asking whether it was “necessary,” a higher bar that requires officers to use the least forceful option available and to attempt de-escalation before resorting to physical measures.¹⁵ An officer’s actions might pass the federal constitutional test and still violate a stricter state statute, with criminal charges or administrative consequences following at the state level.

What Body-Worn Camera Footage Changes

Video evidence has reshaped how force incidents are investigated and litigated. Body-worn cameras provide a real-time record that goes beyond the officer’s own account. Traditional departmental reviews often focused narrowly on the final moment force was used, what researchers call the “split-second syndrome.” Camera footage allows reviewers to see the entire sequence of events, including whether the officer had opportunities to de-escalate before the confrontation turned physical.¹⁶ After Barnes v. Felix expanded the analysis beyond the moment of force, that earlier footage matters more.

Footage cuts both ways. It can vindicate officers who made reasonable split-second decisions, and it can contradict officers who claimed circumstances justified more force than the video shows. In court, video is generally admissible as long as the department can establish a chain of custody showing the footage has not been edited or tampered with.¹⁷ Cameras have limits too. A body camera captures one angle and does not record what the officer felt, smelled, or heard. A camera mounted on an officer’s chest may not show what the officer saw with their eyes, particularly during a physical struggle. Courts are still working through how much weight to give video versus officer testimony when the two diverge.

If you are considering a complaint or lawsuit, the existence of body camera footage is often the strongest evidence available. Requesting the footage through a public records request or legal discovery early matters, because some departments have retention policies that automatically delete footage after a set period if no complaint or legal hold is filed.

1
Supreme Court of the United States. 490 US 386 – Graham v Connor
2
Legal Information Institute. Fourth Amendment
3
Justia U.S. Supreme Court Center. Graham v Connor, 490 US 386 (1989)
4
Federal Law Enforcement Training Centers. Use of Force – Part II
5
FBI Law Enforcement Bulletin. Legal Spotlight – Barnes v Felix and Use of Force Cases
6
U.S. Department of Justice. Department of Justice Policy on Use of Force
7
Justia U.S. Supreme Court Center. Tennessee v Garner, 471 US 1 (1985)
8
U.S. Department of Justice. Chokeholds and Carotid Restraints – Knock and Announce Requirement
9
National Institute of Justice. The Use-of-Force Continuum
10
Office of the Law Revision Counsel. 42 USC 1983 – Civil Action for Deprivation of Rights
11
Legal Information Institute. Qualified Immunity
12
Legal Information Institute. Pearson v Callahan
13
Office of the Law Revision Counsel. 18 USC 242 – Deprivation of Rights Under Color of Law
14
Justia U.S. Supreme Court Center. Kingsley v Hendrickson, 576 US 389 (2015)
15
National Institute of Justice. Overview of Police Use of Force
16
COPS Office. Police Officer Body-Worn Cameras – Assessing the Evidence
17
Bureau of Justice Assistance. Legal Issues Surrounding the Use of Body-Worn Cameras