They try it, but I doubt they suceed...and of course they try it, criminal defendants say the d@mndest things. Heheheh. Especially in vehicular incidents.
__My car's cruise control took over and made me uncontrollably accelerate, causing that fatal crash!
__I never saw that homeless man I hit!
__It wasn't me driving, it was some guy I met in the bar- he must have run off before witnesses arrived, leaving me unconscious by the vehicle!
__There's definitely more discomfort with, and suspicion aimed at the insanity defense. I think it's primarily because it's assumed that insane people must be visibly, obviously insane- so unlike "us" that you could tell them at a glance. We always find it unacceptable that a quiet person, in a conventional role such as mother, could develop an extreme form of mental illness...
__I'd be interested in knowing of any cases where the insanity defense, especially in America, seems to have been too readily accepted by a judge or jury.
__Also, she was "investigated" for nine months? Who investigated...what did they investigate? Her mental health, or her fitness as a mother? Was the investigator a trained psychiatrist, and were they having regular sessions interviewing her? Was she cooperating in talk therapy? It often takes these things to uncover mental illness. Everyone, including the sufferer, fears mental illness so much! Everyone thinks that if they just try harder to think the right kind of thoughts, they can think themselves out of their emotional trouble- not so, when it can be biologically derived or sustained.
__If this was simply child services, monitoring the home environment, why would she reveal any emotional problems she was having? Why would anyone reveal anything of that nature to a stranger, a non-professional, whose job was not even to gather such information, who could not help?