Judicial Council Of California Criminal Jury Instruction 3470
The defendant is not guilty of <insert crime(s) charged> if (he/she) used force against the other person in lawful (self-defense/ [or] defense of another). The defendant acted in lawful (self-defense/ [or] defense of another) if:
1. The defendant reasonably believed that (he/she/ [or] someone else/ [or] <insert name of third party>) was in imminent danger of suffering bodily injury [or was in imminent danger of being touched unlawfully];
2. The defendant reasonably believed that the immediate use of force was necessary to defend against that danger;
3. The defendant used no more force than was reasonably necessary to defend against that danger.
Belief in future harm is not sufficient, no matter how great or how likely the harm is believed to be. The defendant must have believed there was imminent danger of violence to (himself/ herself/ [or] someone else). Defendant's belief must have been reasonable and (he/she) must have acted because of that belief. The defendant is only entitled to use that amount of force that a reasonable person would believe is necessary in the same situation. If the defendant used more force than was reasonable, the defendant did not act in lawful (self-defense/ [or] defense of another).
When deciding whether the defendant's beliefs were reasonable, consider all the circumstances as they were known to and appeared to the defendant and consider what a reasonable person in a similar situation with similar knowledge would have believed. If the defendant's beliefs were reasonable, the danger does not need to have actually existed.
[The defendant's belief that (he/she/ [or] someone else) was threatened may be reasonable even if (he/she) relied on information that was not true. However, the defendant must actually and reasonably have believed that the information was true.]
[If you find that <insert name of victim> threatened or harmed the defendant [or others] in the past, you may consider that information in deciding whether the defendant's conduct and beliefs were reasonable.]
[If you find that the defendant knew that <insert name of victim> had threatened or harmed others in the past, you may consider that information in deciding whether the defendant's conduct and beliefs were reasonable.]
[Someone who has been threatened or harmed by a person in the past is justified in acting more quickly or taking greater self-defense measures against that person.]
[A defendant is not required to retreat. He or she is entitled to stand his or her ground and defend himself or herself and, if reasonably necessary, to pursue an assailant until the danger of (death/bodily injury/ <insert crime>) has passed. This is so even if safety could have been achieved by retreating.]
The People have the burden of proving beyond a reasonable doubt that the defendant did not act in lawful (self-defense/ [or] defense of another). If the People have not met this burden, you must find the defendant not guilty of <insert crime(s) charged>.