“Any good psychiatrist would know the truth for sure!”
We would have the same luck trying to find a good Muslim. Quacks!
There should only be 2 possible outcomes in a trial.
Guilty/Not Guilty!
In the punishment phase prison or rubber room can be discussed but guilty/not guilty should be the verdict.
IMO, no sane person attacks people unless they are defending themselves so you have to be a half bubble off level to commit a crime in the first place.
The only time sanity should come into play is in the punishment and the time for the rubber room should never be shorter than a prison term.
In cases like this, the best thing to do to stop copy cats in this infamous me...me...society is total cut off cameras, news, interviews, etc.
By taking the commercialism out of it, it will help cut the fame seekers at the knees. Close the courtroom to the public and even the artist! Allow only affected families to attend a quick trial, quick sentence, quick appeal and done inside six months.
Never to hear from or about the bastard will deprive him and deter others from obtaining there coveted prize, FAME!