we showed that kyle gilley was the killer. without the forensic evidence 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 knew then that something rotten had happened. >> police think they solved the 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 was a monster in 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 diffuse a situation very quickly. >> she was beautiful, but she was smart about it. >> late one night, as kim drove home from work, she encountered a road rage incident with an angry motorist. >> they started passing