as detective copeland approached the house to make the arrest, he had no way of knowing about joseph benson'st or how far he would go to keep it. when he arrived, benson's front door was locked and barricaded. copeland raced to a side door and broke it down. copeland found benson in bed, his eyes closed, an open bible pressed to his chest. joe benson was unconscious, a bottle of sleeping pills at his bedside. an ambulance took him to the hospital, pumped out his stomach. it was only after that, when copeland began to realize there was more to this story, more to this man, than he knew. >> i asked him, social security number. and he said he couldn't remember it. >> ding dong. >> yeah. i said, for 20 years in the marines, you don't know your social security number? he said, i'm on medication. i just can't recall. >> copeland knew something wasn't right. but what? he sent benson's fingerprints for identification, and finally learned the truth. >> i think he thought he was uncatchable. >> but then he started the old behavior again. >> couldn't stop. i truly believe that he couldn't stop. >> arthu