Self-Defense
Self-defense justifies the use of force when a person reasonably believes force is necessary to protect themselves from imminent unlawful harm, with deadly force allowed only against threats of death or serious bodily injury.
Overview
Self-defense is a justification defense that exonerates a defendant who uses force to protect themselves from what they reasonably believe to be an imminent threat of unlawful physical harm. The defense reflects the law's recognition that individuals have a right to protect themselves when the state cannot.
The elements of self-defense generally require: (1) a reasonable belief that force is necessary; (2) the threat must be imminent; (3) the force used must be proportional to the threat; and (4) in some jurisdictions, the defendant must not have been the initial aggressor.
Deadly force is justified only when the defendant reasonably believes they face an imminent threat of death or serious bodily injury. The reasonableness of the belief is generally assessed objectively — what a reasonable person in the defendant's situation would believe — though some jurisdictions incorporate subjective elements or consider the defendant's particular knowledge and experiences.
People v. Goetz illustrates the tension between subjective and objective standards: Goetz shot four youths on a subway, claiming he believed they were about to rob him. The court held that the objective reasonableness standard governs, though the defendant's circumstances and prior experiences can inform the reasonable person analysis.
State v. Norman raises the "battered woman syndrome" defense — whether a battered spouse who kills during a non-confrontational moment can claim self-defense when the threat is not immediately imminent but is recurring and escalating.
Most jurisdictions require retreat before using deadly force if retreat can be accomplished safely, except within one's home (the "castle doctrine"). Stand-your-ground laws in some states eliminate the duty to retreat entirely.
Key Takeaway
Self-defense requires a reasonable belief in imminent harm and proportional force. Deadly force is justified only against deadly threats.
Exam Tip
Analyze each element: Was the belief reasonable? Was the threat imminent? Was the force proportional? Was the defendant the initial aggressor? Check whether the jurisdiction requires retreat and whether the castle doctrine applies.
Landmark Cases (2)
Frequently Asked Questions
When can deadly force be used in self-defense?
Deadly force is justified only when the defendant reasonably believes they face an imminent threat of death or serious bodily injury. The threat must be immediate, and the force must be proportional. Non-deadly threats cannot justify deadly force.
What is the duty to retreat?
In many jurisdictions, a person must retreat if they can do so safely before using deadly force. The castle doctrine provides an exception: there is no duty to retreat in one's own home. Stand-your-ground states eliminate the retreat requirement entirely.
What is battered woman syndrome in self-defense?
Battered woman syndrome is used to explain why a domestic abuse victim may reasonably perceive imminent danger even during a non-confrontational moment. Some jurisdictions allow expert testimony about the syndrome to support the reasonableness of the defendant's belief.
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