. >> she was supposed to go to mtsu campus to check on her grades and meet some of the office personnel over there. after that, she was supposed to go to her grandmother's house to go swimming. >> investigators found laura's car near the store, miles away from the murder site. investigators found no fingerprints in the car, but they did find a foreign hair. they also found dirt in the wheel wells. >> the fbi lab determined that they were consistent and that there was a high probability that that vehicle had been on that road by the crime scene. >> dan goodwin was laura's friend and had been out with her a few nights before the murder. >> i just asked her if she would like to see a movie, and we wound up going to the movies on sunday, may 27th of 1984. went and saw a matinee show of "the natural" with robert redford. >> at the funeral, dan goodwin promised laura's mother that he'd help find the killer. >> she just grabbed me and hugged me and said please help me find who killed my baby. >> what they really needed was to find the owner of the men's jeans. [ male announcer ] this is joe wo