“Impersonal killers are like drug addicts. The first time gives them the ultimate high, and after that, no high is as good. Unfortunately, the addict doesn't know that. He will chase that high to the gates of insanity and death. By now, killing is all our unsub thinks about. He's set up the exact same situation again and again, hoping to get the same result. He begins to think he's doing it wrong. He becomes obsessed with improving his skills, honing his M.O. And tailoring his weapon to his deadly purpose. He figures if he gets them all just right, if he can get his technique and his tools perfected, he'll feel that first high again. He's becoming a more lethal addict. And he'll never accept that the high is gone and it won't come back. He'll never stop. Never.”