How have courts and juries treated mental health issues?

"will turn over the determination of crime and criminal liability to psychiatrists, whose opinions are usually based in large part upon defendant's self-serving statements, instead of to Courts and juries, and ... will greatly jeopardize the safety and security of law-abiding citizens and render the protection of society from criminals far more difficult than [200 Cal.App.3d 1455] ever before in modern history." ( State v. McClendon, supra, 437 P.2d 421, 425.)