The U.S. Supreme Court in Graham v. Connor (1989) 490 U.S. 386 established that the constitutional reasonableness of force is judged from:

Explanation

Graham v. Connor adopted the objective-reasonableness standard for Fourth Amendment seizure-by-force claims: courts judge force from the perspective of a reasonable officer on the scene, without 20/20 hindsight, considering all the facts and circumstances, including the severity of the crime, whether the suspect poses an immediate threat, and whether the suspect is actively resisting or attempting to flee. Subjective intent (a) is not the test; suspect perception (c) is not the standard; outcome-based liability (d) was rejected. Although Graham concerns peace officers, its reasonableness framework informs private-security civil standards.