Under what circumstance can a guard use deadly force?

A guard is permitted to use deadly force only in circumstances where there is an immediate life-threatening attack. This principle is grounded in self-defense laws and the ethical standards of security practices, which dictate that the use of force must be proportional and necessary. The use of deadly force is a last resort to protect oneself or others from imminent harm or death.

In scenarios where an individual faces an immediate threat to their life or the lives of others, the need for self-preservation and the preservation of life take precedence. This aligns with the legal standards that exist to ensure that security personnel act within lawful parameters when responding to threatening situations.

The other options do not meet the stringent criteria for the use of deadly force. For instance, preventing property theft does not justify lethal action, as the protection of property is not comparable to the defense of human life. Similarly, verbal threats do not constitute an immediate physical threat that would warrant deadly force. Lastly, detaining a suspect can be conducted through other means that do not involve deadly force, which should only be considered under life-threatening circumstances.