He certainly looks pretty mentally disturbed, for what that's worth, which isn't much.

Even with insanity there's a kind of rationale for something like this, and the important thing should be trying to identify what kind of factors could have led up to it,in the hope of trying to prevent something like this happening again. Thinking in terms of death penalties and so forth just gets in the way of that, and focuses attention on stuff that is essentially irrelevant.