Castle Doctrine

The castle doctrine is a self-defense principle holding that a person has no duty to retreat before using force, including deadly force, when they are attacked in their own home. The doctrine is rooted in the common-law maxim that a person's home is their castle, and it reflects the deeply held belief that individuals should not be required to flee from their own dwelling to avoid a confrontation.

At common law and under the Model Penal Code, a person claiming self-defense generally has a duty to retreat before using deadly force, if retreat can be accomplished in complete safety. The castle doctrine carves out an exception to this retreat requirement: when the defender is in their own home, the duty to retreat does not apply. The rationale is that the home is the one place where a person should feel most secure and should not be forced to abandon to an aggressor.

Many jurisdictions have expanded the castle doctrine through "stand your ground" statutes, which eliminate the duty to retreat in any location where the defender has a legal right to be. These statutes have generated significant controversy, particularly after high-profile cases questioning when the use of deadly force is justified. Critics argue that stand your ground laws encourage unnecessary violence and disproportionately affect minority communities. Defenders contend that requiring retreat places an unfair burden on the victim and rewards aggressors.

The castle doctrine is subject to important limitations. In most jurisdictions, the initial aggressor cannot invoke the doctrine. The defender must have a reasonable belief that deadly force is necessary to prevent death, serious bodily harm, kidnapping, or sexual assault. Some jurisdictions require that the intruder be attempting unlawful and forcible entry. The doctrine generally does not apply against persons with a right to be in the home, such as co-occupants or invited guests.