Was found buried alive after 3 months by her roommate's boyfriend:
http://www.crimescene.com/purity/summary.html
Laci Peterson's body was found 5 months later: her purse was in her home.
Chandra Levy's Body was found almost 13 months after she died just a short distance from her home. She was a jogger! Her purse was found in her home
Tara has been missing for going on 5 months. Her purse and keys were with her when she disappeared. That bothers me the most about the differences in these cases.