I think it was a bit of both. He had... that, something, inside him all this time. But I don't think he went off like that for no reason. Like... something triggered it.

[there's a bit of an uncomfortable feeling... that whole case was pretty miserable, from beginning to finish.]

... I know it's just useless speculation at this point.

The important thing is that we probably can't stop murders from happening. At most, if we really wanted to, we could potentially redirect them. Choose to kill someone so that mysterious forces don't choose someone else to do it. Maybe.