Castle Doctrine: This is a legal doctrine that designates a person's abode (or, in some states, any legally occupied place) as a place where they have protections and immunities permitting them to use force (up to and including deadly force) to defend themselves against an intruder.
Stand Your Ground Laws: These are laws that allow people who believe they face a serious threat of harm to "stand their ground" and defend themselves without retreating first.
Justifiable Homicide: This refers to situations where killing another person is not considered criminal due to the circumstances, such as self-defense when one's life is threatened.