Apparently the state is trying to kill this obviously insane defendant and the parents are pleading against it.
If this kid doesn't meet the legal definition of insane, I can't imagine anybody who does. It makes America look bad when it tries to kill the mentally deranged rather than treat them.
It's a tricky thing. I actually secured a complete acquittal in a first-degree murder case a few years ago, based on an insanity defense (which is very rarely successful - in my case it was a fairly straightforward exercise but generally this defense fails). I have never handled another murder case, and doubt I ever will, so plan to keep my 100% success rate alive!
The legal standard for insanity requires not just that the person is insane - prisons are full of crazy people, and nearly anyone who commits multiple murders has some significant, diagnosable personality disorder. The common law also requires that the person does not understand the nature and/or wrongfulness of his actions (CO law has modified this to allow an insanity defense where the mental illness creates an "irresistible impulse" to commit the crime). Colorado is a slightly odd duck in this regard, in that once an insanity defense is asserted, the state has the burden of proving that the offender was sane at the time of the offense.
I have no doubt James Holmes is mentally ill - he seems like a classic schizophrenic. It is less clear to me that his mental illness caused this offense within the requirements of an insanity defense. The crime involved a great deal of planning and premeditation, and it seems clear to me that he intended to kill people and understood that's what he was doing. I haven't seen anything indicating that he didn't know it was wrong (to the contrary, he styled himself as the villainous Joker). To me the operative question will be whether the mental illness created an irresistible impulse to kill. Frankly I think the answer is probably a yes, but we shall see. In any event I don't believe he is a person who should ever be out of custody, because his mental illness seems to make him so dangerous.