I have argued before the need to break the trial into two phases.
1. Basic facts, for guilt or innocence. Did the accused commit the CRIME?
2. Factors and mitigation. Was the person insane? An insanity finding would argue against the death penalty, but in favor of life with no chance to get out, ever, ever.
For the guy that shot Reagan, the idea he gets out is stunning. The idea of temporary insanity is stunning, to me.
The idea a person is insane, to escape death, but then sane to get out of prison, indicates it is our justice system which is insane.