What is required for the justification of using deadly force as per Arizona law?

The justification for using deadly force under Arizona law hinges primarily on the principle of proportionality to the threat faced. When an officer encounters a situation where they believe their life or the life of another person is in imminent danger, the use of deadly force must be a suitable response to the degree of threat posed. This means that the level of force used must correspond directly to the level of threat encountered. If the threat is lethal, then the use of deadly force may be justified, but if the threat does not warrant such a response, then deadly force would be deemed excessive and unjustifiable.

In this context, the other options do not hold as requirements under Arizona law. The use of deadly force is not limited to daylight hours, nor does it require prior approval from supervisors—officers have the authority to use deadly force based on their immediate perception of a threat. Furthermore, while warrants are critical for certain law enforcement actions, they are not a prerequisite for employing deadly force in situations where officers are responding to imminent threats. Thus, the requirement for proportionality ensures that deadly force is used judiciously and appropriately in accordance with the law.