Which of the following scenarios represents a valid use of deadly force?

The use of deadly force is justified under Pennsylvania law when there is an imminent threat of serious bodily harm or death. This means that if an individual reasonably believes that their life or the lives of others are in immediate danger and that such force is necessary to prevent that harm, it is legally permissible to respond with deadly force.

In the scenario of stopping an imminent threat of serious bodily harm, the perception of danger must be immediate and credible. The law recognizes the right to use deadly force as a last resort when all other means of preserving life or preventing grievous injury are not viable. This aligns with the principle that preserving life and protecting oneself against significant threats justifies the use of the highest level of force available.

In contrast, preventing a theft in progress, defending oneself from a minor assault, or simply searching for an intruder in one's home do not typically satisfy the legal criteria for justifying deadly force, as none of these situations imply an immediate risk of serious bodily harm or death.