In which scenario would the use of deadly force be justified?

The use of deadly force is justified in situations where there is an imminent threat to life and the possibility of serious injury. When a subject lunges at an officer with a knife, they are actively posing a lethal threat. In such circumstances, the officer must prioritize their safety and the safety of others around them. The law recognizes that when faced with an imminent danger like this, the officer is authorized to respond with deadly force in order to neutralize the threat, as their life and the lives of innocent bystanders are at stake.

In contrast, scenarios such as a suspect fleeing from the scene, an officer being verbally insulted, or a supporter standing firm during an arrest do not present the immediate threat to life that would justify the use of deadly force. None of these situations show an active attempt to cause harm, and therefore, the response required would not necessitate lethal measures.