the same time, police asked the surviving roommate, lauren meanza, if she knew anyone who smoked thisttes. >> she had let us know, well, the only smoker i can think of at this point is eric copple. >> 25-year-old eric copple was a land surveyor and a friend of one of the victims. but before police 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