the shelley nance murder investigation had taken a dramatic turn. e detective's radar he was now taking a hard look at nathan's roommate, daniel william. he admitted he was at shelley's apartment complex the day of the murder, and according to friends he was gel offense the young woman. but did he hate shelley enough to kill her? turns out the killer left behind a crucial clue, and it was about to land that person behind bars. once again keith morris. >> reporter: a few weeks after the murder of art student shelley nance, the police were waiting for the results of a test they hoped would explain everything -- the dna on that bloody baggie found in nathan's bathroom. >> if it comes back to shelley, we've got a golden ticket. we know who committed -- well, we know one of two people or both committed this murder. it's not by coincidence that this girl ends up dead and her blood ends up in their apartment in the bathroom. daniel killed her, nathan killed her or they both killed her. >> reporter: hope for the investigators -- dread for art student chris p