AB2584 (2026): The Preemptive Self Defense Act — Expanding Self-Defense Protections

What the Bill Would Do

Assembly Bill 2584, titled the "Preemptive Self Defense Act of 2026," would expand California's existing self-defense protections^[1]. California's self-defense framework is codified primarily in Penal Code sections 196-199 and the Castle Doctrine provisions of PC 198.5. Contrary to a common misconception, California already has no general duty to retreat — CALCRIM jury instruction 505 (Justifiable Homicide: Self-Defense or Defense of Another) explicitly states: "A defendant is not required to retreat." The Castle Doctrine under PC 198.5 further provides a presumption of reasonable fear when an intruder unlawfully enters one's home.

AB2584 would build on this existing framework in several specific ways: it would authorize defensive action based on a perceived imminent threat, provide civil immunity for individuals who use force in lawful self-defense, and prohibit courts and juries from considering a defendant's martial arts or combat training as a factor when evaluating whether the level of defensive force was reasonable. The bill has been referred to both Public Safety and Judiciary committees, indicating it addresses both criminal law policy and legal doctrine questions^[2].

Current Status

AB2584 was referred to the Committees on Public Safety and Judiciary on March 9, 2026. The dual committee referral means the bill must pass both committees before reaching the Assembly floor.

What to Watch

The bill represents a significant expansion of self-defense rights in California. The civil immunity provision is particularly noteworthy — under current law, even a person who is acquitted of criminal charges for using defensive force can still face a civil lawsuit from the attacker or their estate. The martial arts training provision addresses a concern that trained individuals have been held to a higher standard of restraint in self-defense cases. The "preemptive" language — allowing action based on perceived imminent threat — will be the most closely scrutinized element, as it lowers the threshold from an actual imminent threat to a reasonably perceived one. California's current framework was established largely through case law (e.g., People v. Humphrey, People v. Aris) and CALCRIM jury instructions rather than detailed statutory language, so codifying these expanded protections in statute could have significant practical effects on how self-defense claims are evaluated by prosecutors and juries.