Use of Force and De-escalation
The constitutional floor and the policy layer
Graham v. Connor makes reasonableness objective, judged from the perspective of a reasonable officer on the scene, without the benefit of hindsight. The three Graham factors are the severity of the crime at issue, whether the subject poses an immediate threat to officers or others, and whether the subject is actively resisting or attempting to evade arrest by flight. Tennessee v. Garner limits deadly force: it may not be used to prevent the escape of a suspect who poses no immediate threat of serious harm. Above that constitutional floor sit agency policy, District law, and training standards - force can be constitutional yet still violate policy, and questions often test exactly that gap.
De-escalation
De-escalation is not a duty to retreat or to forgo force. It is the deliberate use of time, distance, cover, concealment, communication, and repositioning to reduce the need for force. Officers also have a duty to intervene to stop excessive force by another officer when they observe it and have a realistic opportunity, and a duty to render aid once the scene is safe.
Traps
"Least amount of force" is not the legal standard; reasonable, necessary, and proportional is. Officers are not required to wait until attacked before acting against an imminent threat, and warnings are required where feasible before deadly force, not before every application of force. Documentation and notification after any force are mandatory; failure to report is itself a violation.
Rule of thumb
Imagine a jury watching the body camera with the audio off - can you narrate the specific threat that justified each action?