after all, livers' girlfriend, a woman with an impeccable reputation, insisted matt was home all night with her, 30 miles away in lincoln the night of the murders. the same with nick sampson's girlfriend who swore he never left their house that night. and she passed the polygraph. >> if she would have thought that nick had done this, she would have thrown him under the bus in a heartbeat. there's just no doubt about that. >> reporter: then the lawyers went looking for evidence of the phone calls matt described in his confession, calls in which he and nick supposedly planned the murders, and the records revealed there wasn't one call, not one between matt and nick in the days before the murder. >> that phone communication never took place. you know, it simply didn't occur. >> reporter: but couldn't they have used, you know, those kind of phones that you can buy that you can't trace? >> that's theoretically possible, but there's no evidence of that. >> reporter: add to that a ballistics test confirmed the