On the Loose — Andrew Coburn

By the time he was twelve years old, young Bobby Sawhill had killed two people, brutally and with no remorse. He was tried as a juvenile and sentenced to a youth detention center, where he refused counseling. All he seems to care about is bodybuilding, getting bigger. Stronger. Soon he'll be twenty-one. He'll be released--and then Bobby's coming home. Home to a small town that will live in fear, certain that Bobby will kill again, unable to do anything but wait for him to strike.