I understand that reaction. But I don’t agree with it. At least in our legal theory, we only hold people responsible for criminal conduct when they have the required “culpable” mental state. In turn, that demands that they understand the wrongfulness of their behavior at the time of the commission of the acts.
This is often fairly easy to prove. Getting an acquittal on the basis of “mental disease or defect” is actually uncommon. But when the law is properly applied, it could spare the life of some bastard who had simply been literally insane.
But if you show me (as a juror) that the bastard tried to hide himself or conceal evidence of his behavior, then you’ve also shown me that he appreciates that it was wrong. In that case, no determination of mental diaease or defect.
In NY State, it’s all academic anyway. No death penalty. In the Buffalo case, I understand the Feds may still prosecute him, though. The moron is presently serving 11 consecutive life sentences.