In which scenario is the use of deadly force legally justified?

The use of deadly force is legally justified when a person is in fear of serious bodily injury. This principle is grounded in the self-defense doctrine, which permits individuals to use reasonable force to protect themselves from harm. If there is a genuine and reasonable belief that one is facing an imminent threat that could result in serious bodily harm or death, the law allows for a response that includes the use of deadly force to neutralize that threat.

This scenario aligns with legal standards that stress the importance of individual safety and the necessity to protect oneself from an immediate and severe danger. The "reasonable person" standard applies here—if an average person in the same situation would perceive a substantial risk of serious harm, then the use of deadly force may be deemed appropriate under the law.