had a receipt showing she was there. >> so scott rejoined his family, caught up in the terrible business of grieving. >> i kept wondering why was it happening to o family. >> it was awful. who would ever imagine you'd have a murder in your family. >> investigators tried, with the help of friends, to fill in the gaps of teresa's last hours. they talked to scott and teresa's friend, dawn lavender, who had plans to go shopping with her the night of the murder. >> i'm sure dawn was shocked at what happened. >> she did cry during the interview and at her house waiting on teresa to pick her up and going to ride with her. she finally got a chance to talk with teresa around 7:00. >> after that call, nothing. >> dawn told investigators she called teresa over and over and each time the phone went to a recording. just to be sure of all this they pulled teresa's cell phone