we could put kyle gilley in those jeans. we could put kyle gilley at the scene of the murder. >> but what was the motive? >>> 16 years after laura salmon's murder, her high school boyfriend, kyle gilley, was arrested and charged with her murder. laura's mother say she told the original investigators that gilley killed her daughter. she said his jealousy was out of control. >> i told them why i thought it was him or why i knew it was him, and i was very frustrated that they didn't take that seriously. >> for the record, no one is willing to speculate why the original investigators didn't look deeper into gilley's alibi. it was clear to the cold case unit that gilley should have been the prime suspect all along. couldn't have her, nobody else could. >> the night before her murder, laura told friends she had a date with a friend, and the two went to a local nightclub. investigators believe gilley knew laura was dating others and may have followed her to the nightclub. >> that unknown dna was the motive, that kyle was jealous an

dence, put kyle gilley at the scene. we've showed that kyle gilley was the killer. without the forensic evidence, there's no conviction. >>> up next a young woman makes a desperate plea for help. >> she was very shook up. >> before vanishing without a trace. >> we need them. >> police think they solved a case until it takes a turn no one expected. >> it's just hard for a lot of people to believe. >> i almost got sick. >> it was the ultimate betrayal. >> oh my god, he's a monster in disguise disguise. >> she got murdered for obeying the law. >>> customers at the men's club in charlotte north carolina could occasionally get a little raucous. but the employees were trained to handle those situations. 26-year-old kim medlin worked there as a waitress the money was good. >> she knew how to handle people. she could defuse a situation very quickly. >> she was beautiful but she was smart about it. >> late one night, as kim drove home from would she encountered a road rage incident with an angry motorist. >> they started passing her, driving closely behind her. blowing the h