. >>> in december of 1969, diane maxwell pulled into the company parking lot in houston, texas. it was sunday, and downtown was virtually empty. diane worked for the southwestern bell company, and her shift started at 1:00 p.m. but she never made it inside the building. a half hour later, a homeless man saw someone walking away from an old shack next to the parking lot. >> he walked back to the shack and walked very close to him and got a good look at him and went on to the shack, and he found this young girl lying on her back with her hands tied behind her back, and he asked her if she had been assaulted. shed a said yes. >> she asked him to untie her, and he said no. but he agreed he would go call the police. >> tragically, by the time police arrived, 25-year-old diane maxwell was dead. >> she was lying on her back, bra pushed up, a small wound just above her navel, probably an inch in width. >> diane was just 25 years old, a single mother of a 4-year-old son. >> well, i will tell you that it was the most devastating thing i had ever experienced. my first reaction was denial, t