## Facts

- A 1995 drive-by shooting occurred in Stockton, California, involving defendants Ejaan Dupree McCoy (driver) and Derrick Lakey (front passenger), both armed.
- As their car approached four men on a street corner, multiple shots were fired from the car toward the group.
- Witnesses testified that both McCoy and Lakey fired handguns; two victims were struck, one fatally and one nonfatally.
- Someone from the street returned fire, wounding Lakey.
- Ballistics evidence showed McCoy fired the bullets that caused the fatal wounds.
- McCoy testified he shot because he feared being shot, describing an earlier incident that day when shots were fired at him and claiming he later saw a man who appeared to be holding a gun.
- A jury convicted both defendants of first-degree murder and two counts of attempted murder, based on a drive-by shooting theory.
- The Court of Appeal concluded the jury had been improperly instructed on imperfect self-defense as to McCoy and reasoned that if McCoy’s culpability was mitigated, Lakey could not be convicted of a greater offense on the same evidence; it reversed both defendants’ murder-related convictions.

## Issues

1. Whether an aider and abettor may be convicted of a greater homicide-related offense than the actual perpetrator when the perpetrator may have a personal mitigating defense, such as imperfect self-defense.
2. Whether an aider and abettor’s liability for murder must track the actual perpetrator’s mitigated degree of guilt when both are tried together on the same evidence.

## Decision

- The California Supreme Court reversed the portion of the Court of Appeal’s judgment setting aside Lakey’s convictions.
- The court held an aider and abettor may be convicted of a greater homicide-related offense than the actual perpetrator.
- The court ruled that accomplice liability turns on the aider and abettor’s own mens rea, not solely on the perpetrator’s degree of guilt.
- The court concluded the Court of Appeal erred by treating any mitigation potentially applicable to McCoy (imperfect self-defense) as automatically reducing or nullifying Lakey’s murder-related convictions.
- The matter was remanded for further proceedings consistent with the Supreme Court’s opinion.

## Legal Principles

- An aider and abettor’s culpability depends on the perpetrator’s acts combined with the aider and abettor’s own mental state; it is not purely vicarious.
- An aider and abettor may be guilty of a more serious offense than the actual perpetrator if the aider and abettor harbored a more culpable mens rea.
- Defenses or extenuating circumstances that are personal to the actual perpetrator do not necessarily apply to an aider and abettor.
- Imperfect self-defense (an honest but unreasonable belief in the need to defend oneself) negates malice for the actor who holds that belief and can reduce murder to voluntary manslaughter, but it does not automatically negate malice for an accomplice who does not share that belief.

## Conclusion

The court held that accomplice liability in homicide is measured by the aider and abettor’s own mens rea, allowing an aider and abettor to be convicted of murder even if the actual shooter’s culpability could be mitigated to manslaughter by a personal imperfect self-defense claim.


People v. McCoy, 25 Cal. 4th 1111 (Cal. 2001)