his name was david wilt.it didn't take long for investigators to eliminate him as a suspect. >> he was out of state at his parents' house for thanksgiving, and so, you know, he had a very solid alibi. >> investigators interviewed everyone corey spoke with at the ritz bar on the night of her murder. most of the people corey saw that night left the bar before she did, but one friend, tiffany smith, stayed with corey until 1:00 in the morning. tiffany told police they both left the bar at the same time in their own cars and went their separate ways. but tiffany told friends that wasn't the only contact she had with corey that night. >> she said she called corey from her cell phone around 2:00 a.m. and corey answered the phone. she said when corey answered the phone that corey was asleep and she asked her what she was doing. corey said, i'm sleeping. >> tiffany also told friends she drove to corey's apartment around 4:00 a.m. and knocked on her door, but no one answered so she left. >> her statement that she went