““But if they were capable of killing, wouldn't they just do it again? It was something he'd never really understood. It probably varied from person to person. Even if he'd been angry enough and had gone off the deep end for long enough to kill Lenard, he didn't think it would have led to other crimes. But perhaps that was the thing about murder: it was such a deep violation of the acceptable and decent that it forever changed and warped a person, so that they were never the same again. So that they were capable of...anything.””