A tough case, since the guy’s obviously insane, but still he knew the ‘consequences’.
“If there were only one person in the world, there would be no concept of personal responsibility. Such concepts and their importance to a culture come out and only exist in a social context. They are social rules learned by groups. Everyone can learn them, and I think everyone should be held accountable to them. The last 150 years of science is on a sure path towards determining more and more how our brains work in an automatic way. There is no getting around that fact. But that doesn’t mean an automatic machine like the brain cannot learn rules. Schizophrenics stop at red lights.” -Neuroscientist Michael Gazzaniga, author of Who’s in Charge?: Free Will and the Science of the Brain