Pennsylvania law allows for self defense to be used in two (2) circumstances: when the actor is using force to defend himself and when the actor is using force to defend others.
This entry will deal with Pennsylvania law of using force to defend other persons. The law states that the use of force upon or toward the person of another is justifiable to protect a third person when:
1. the actor would be justified under the self-defense section in using such force to protect himself against the injury he believes to be threatened to the person whom he seeks to protect;
2. under the circumstances as the actor believes them to be, the person whom he seeks to protect would be justified in using such protective force; and
3. the actor believes that his intervention is necessary for the protection of such other persons.
The person using force to defend another person is not obliged to retreat to any greater extent that the person whom he seeks to protect would be required to retreat.