Final Answer:
Deadly physical force can be used to prevent or terminate crimes that pose an imminent threat of death or serious bodily harm to oneself or others.
Step-by-step explanation:
Imminent Threat of Death or Serious Bodily Harm: Deadly force is justified when there is a direct and immediate threat of death or serious bodily harm. This could include situations where someone is about to use force likely to cause severe injury or death.
Self-Defense and Defense of Others: The use of deadly force is generally acceptable for self-defense or defense of others when faced with an imminent threat. It is crucial that the force used is proportionate to the threat. Deadly force can be used to prevent certain crimes, such as murder, kidnapping, sexual assault, or robbery, when these crimes involve an imminent threat of death or serious harm.