Not legal advice, but it seems like it boils down to an insanity test where that insanity deprives the act of suicide of its voluntariness. The "irresistible im

Not legal advice, but it seems like it boils down to an insanity test where that insanity deprives the act of suicide of its voluntariness. The "irresistible impulse" test used to exist in California penal law, and is what got Lorena Bobbitt acquitted. To prove it in this context, it would certainly help to have testimony about a descent into insanity that was apparent to those around the decedent, or even some medical evidence, but the very short timespan here makes that evidentiary basis far more difficult. I do not know enough about the caselaw to say whether taking the time to write a suicide note like that tends to evidence voluntariness; anecdotally, it seems like a contemplative act that would show that the decedent understood what he was about to undertake. If you can grab a copy, Tate v. Canonica, 180 Cal. App. 2d 898 (1960) is a good overview of the law and an example of when there isn't enough evidence. Grant v. F.P. Lathrop Constr. Co. 81 Cal. App. 3d 790 (1978) is an example of when a suicide can be linked to the defendant's conduct (negligence).