Which of the following must a person believe before using deadly force in a lawful arrest?

In the context of using deadly force during a lawful arrest, it is essential for the individual to genuinely believe that the arrestee has used or is about to use deadly force. This belief is critical because the use of deadly force is a significant escalation in any situation and must be justified by the perceived threat to life. The need for reasonable belief in the threat of deadly force aligns with the principles of self-defense and defense of others, where one is justified in responding similarly if they believe their life or the lives of others are at an imminent risk.

Understanding this principle helps reinforce the importance of assessing the situation critically before resorting to deadly measures. It emphasizes that a mere suspicion or assumption is insufficient; there must be a firm belief grounded in the actions of the arrestee that justifies such a response. This understanding is vital for ensuring that the use of force remains appropriate and lawful, in line with legal standards governing the use of physical force by security personnel and law enforcement.