>> i pulled the trigger. >> reporter: but james matlean did not shrink from it. he murdered ben oxley in his sleep and must live with what he did for the rest of his days. >> i'm afraid to deal with what i actually did. >> reporter: he told his story in court last december. it was after the d.a. took the death penalty off the table and james decided to plead guilty. and that's when melissa sitting in the courtroom heard for the first time about something else. james was supposed to kill her, too. >> dawn asked me if i would kill melissa. i just automatically said yeah. >> reporter: there was a bullet there for you. what was it like to hear that? >> unreal. >> do you believe that she was in the house that night? >> i do, which makes me sick. i have a harder time with dawn than i do james, because if it wasn't for her, none of it would happen. >> reporter: and that's where