The first time Dimitri Castallanos experienced obsession, he committed a felony. He was five. Dimitri is a psychopath. And he's still obsessed with just one person. Arlo Miller was born a victim, raised as his father's punching bag and his mother's scapegoat. Dimitri was his only protection, and they took him away. As children, they clung to each other. As adults, they pretend neither remembers, while...