Cliff's murder

At the end of the second book, Jay's true past was revealed (which was explained in the side story, 'Unwanted'). Out of anger, Jay sent Cliff away. Being alone and scared and feeling guilty took it's toll on Cliff's mental health. No one had heard from him, including his wife. Libber received a call from Cliff one evening, explaining how sorry he was and how he would never be coming home. After the phone call, Cliff attempted to take his own life and was found lying by the side of a road dead. It was later revealed that Cliff had actually been murdered instead, effecting Jay's mental state too.