Under what condition are you no longer authorized to use deadly force?

The use of deadly force is grounded in the principle of necessity, which means that it should only be employed when absolutely required to protect oneself or others from imminent harm, such as the risk of death or serious injury. When a subject has ceased the action that necessitated the use of deadly force, this criterion for necessity is no longer met. At this point, the situation has changed, and the justification for using such lethal measures is no longer valid.

If the subject has stopped their threatening behavior, the imminent threat is eliminated, therefore justifying the cessation of deadly force. This is aligned with standard protocols emphasizing de-escalation and the use of the least force necessary to achieve compliance and ensure safety.

The other scenarios provided do not specifically address the immediate context of a disengaged threat. For instance, having backup present, while potentially enhancing safety, does not inherently change the threat level posed by an individual. Similarly, a subject surrendering or a situation being resolved peacefully are certainly desirable outcomes, but they do not emphasize the critical change in a subject's actions that would warrant the discontinuation of deadly force.