(Can you hijack a thread you started... LOL) Anyway, this made me think of a special that aired on ABC a few weeks ago called Mind of a Psychopath. It's all about how the brains of mass murders are physically different from the rest of us, but they also show that just because you have a brain like that, it doesn't mean you're going to kill. Very interesting series. We showed it to our science classes all four segments. They also talk about Chris Benoit, the wrestler who murdered his wife and son a few years ago. They talk about how all the concussions he suffered gave him such severe brain damage that it might have actually caused him to murder.