I don't think it was a concern about a guy self-incriminating, I think it might have been "I'm about to waste you, so you better shut up". I think you'd have to be a robot to not want to do something to him. His neighbor said he was a very angry guy and always screaming at his wife and kids, but this was not a crime of passion, he planned it. I don't know - he's a loser, he's angry, what conspiracy did he believe. Did he think his kids had serpent DNA or some stupid crap like that?"