What is a requirement for a person using deadly force during an arrest?

The requirement that a person must reasonably believe it is necessary to prevent serious harm is central to the justification of using deadly force during an arrest. This concept is grounded in the principles of self-defense and the protection of life. The individual must assess the situation and conclude that their life, or the life of others, is in imminent danger. This reasonable belief must be based on the circumstances as perceived at that moment, not on hindsight or speculation.

For example, if an officer confronts an armed suspect who poses a credible threat, the officer's belief that using deadly force is necessary to prevent serious harm would be justified. This requirement establishes a legal and ethical threshold that helps to ensure that deadly force is not used arbitrarily or inappropriately, ultimately prioritizing the preservation of life in critical situations.