10 Use-of-Force Principles Every Officer Should Know

Use-of-force doctrine is federal constitutional law, but it does not operate in isolation. Agency policy, state law, professional standards, and community expectations all shape how force decisions are made, documented, and reviewed. This list is a practical foundation — not a substitute for agency-specific training, policy review, or legal counsel.

1. 1

   The Graham Standard Is the Constitutional Floor

   Graham v. Connor, 490 U.S. 386 (1989), established that all claims of excessive force during a seizure are evaluated under the Fourth Amendment's objective-reasonableness standard. The question is whether the force used was objectively reasonable from the perspective of a reasonable officer on the scene — not in hindsight. The three Graham factors — the severity of the crime, whether the subject poses an immediate threat, and whether the subject is actively resisting or fleeing — remain the controlling framework for every use-of-force analysis in the United States.

2. 2

   Reasonableness Is Judged at the Moment of Force

   The Supreme Court in Graham was explicit: reasonableness must be judged from the perspective of a reasonable officer at the moment force was applied, not with the benefit of hindsight. This means that information the officer did not have at the time — even if it would have changed the outcome — is generally not relevant to the constitutional analysis. Officers should be trained to articulate what they knew, observed, and reasonably believed at the precise moment they used force.

3. 3

   Deadly Force Requires a Significant Threat

   Tennessee v. Garner, 471 U.S. 1 (1985), ended the common-law fleeing felon rule. Deadly force is constitutionally permissible only when the officer has probable cause to believe the subject poses a significant threat of death or serious physical injury to the officer or others. Fleeing alone — without more — does not justify deadly force. This principle is foundational to every agency's deadly force policy and every use-of-force training curriculum.

4. 4

   Pre-Force Conduct Can Be Part of the Analysis

   Barnes v. Felix, No. 23-1239 (2025), clarified that the reasonableness inquiry is not limited to the precise moment force was applied. A court may consider the officer's conduct leading up to the use of force — including tactical decisions that created or escalated the confrontation — as part of the totality of the circumstances. Officers should understand that how they approach, position, and communicate before force is used may be examined alongside the force decision itself.

5. 5

   The Number of Shots Is Not Itself Determinative

   Plumhoff v. Rickard, 572 U.S. 765 (2014), held that once deadly force is constitutionally justified, officers are not required to stop until the threat is eliminated. The number of shots fired is not independently determinative of whether force was excessive. What matters is whether each application of force was reasonable given the continuing threat — not whether a different number of shots would have been sufficient.

6. 6

   Each Use of Force Is Evaluated Independently

   County of Los Angeles v. Mendez, 581 U.S. 420 (2017), rejected the Ninth Circuit's provocation rule. The Supreme Court held that each use of force must be evaluated independently under Graham. A prior constitutional violation does not automatically make subsequent force excessive — and conversely, lawful force does not cure an earlier unlawful entry or seizure.

7. 7

   Vehicle Pursuits Are Subject to Graham

   Scott v. Harris, 550 U.S. 372 (2007), confirmed that Graham's objective-reasonableness standard applies to force used during vehicle pursuits. An officer who uses significant force to end a chase that poses serious danger to the public may be acting within constitutional limits — even if the force is substantial. The key question remains whether the force was objectively reasonable given the threat the fleeing vehicle posed to officers and the public.

8. 8

   De-Escalation Is Both Policy and Tactics

   De-escalation is not a constitutional requirement under current federal doctrine, but it is widely required by agency policy, state law, and professional standards — and it is sound tactics. Slowing down a situation, creating distance, using cover, and communicating clearly before force becomes necessary are skills that reduce risk to officers, subjects, and bystanders. Many agencies now require officers to document de-escalation efforts, or explain why they were not feasible, in every use-of-force report.

9. 9

   Documentation Must Match the Articulation

   A use-of-force report is a legal document. The facts an officer articulates in a report — the specific behaviors observed, the threat perceived, the options considered, and the force applied — form the record that supervisors, prosecutors, civil attorneys, and courts will review. Vague language without specific factual support is inadequate. Officers should document the specific observations that drove each decision, in the sequence they occurred.

10. 10

    Agency Policy May Be More Restrictive Than the Constitution

    The constitutional standard is the floor — not the ceiling. Many agencies have adopted policies that require de-escalation before force, prohibit certain techniques regardless of constitutional permissibility, or impose additional reporting requirements. State law may also impose stricter standards. An officer who acts within constitutional limits may still violate agency policy or state law. Officers must know both the constitutional framework and their agency's specific requirements.