My friend, well outstanding man, is accused of something he didn't do. His words "it's totally made up. Not even close." The plaintiff has prior mental history. However, friend's Public Defence doesn't do much, except getting a plea of 5 years in prison. It's not right that sane people suffers for someone's insanity.

If this man wished to plead a mental defense, he can but he must tell his attorney to do this. (Attorneys have to do what we tell them, but can advise us different)
The issue is, that normally we pay for that medical exam, although it can be done by court.

But that level is that they did not understand, what they did was wrong at the time, they did it. They have to admit they did it, but because of an mental defect, did not understand it was wrong. (loose idea of how it works)

With that said, even if that works, it is not like TV, they may go to a secure mental health facility ( yep you guessed it, a prison mental health ward)

Fr. Chuck. I read the plaintiff is alleged to have past issues, not the defendant.