eric copple was a land surveyor and a friend of one of the victims. e could question him, copple walked into police headquarters and confessed. >> i'm just getting done with dinner, and i get a phone call at home. someone's here at the police department and they want to confess. >> copple said he knew adriane insogna. >> it was that cold feeling that came over me. i didn't know what to feel or at that moment. i really didn't know. >> we want to make sure that he knows details about the crime and the things he's telling us match up with what we already know about the crime scene. we want to make sure that it's information that hasn't been released to the media. >> although eric copple confessed, he wouldn't tell police why he did it. >> he always claimed he didn't know what he did with the murder weapon, which, again, to me always suggested to me that he wasn't telling the truth, because it would seem to me that that would be something he'd be able to tell us. >> eric was very elusive as far as the question of why the crime happened. we could never get