Melissa unravels another cold case brought to us by a Tip-Ster - this one frustrating to the point of maddening.  In July 1999 in Fresno, California, teacher/wife/mother, 54 year-old Sandra Kerby went to Target to pick up a few things - and was never seen or heard from again.  In the intervening years, lots of evidence points to one suspect - but not enough of it to issue an arrest warrant.  And that is a tragedy - because Sandra Kerby, by all accounts, was one of the truly good people, and she left behind dozens of friends, family and former students who, to this day, seek answers.  Someone out there knows something about what happened to Sandra...is it you?  Now's the time to drop your tip on us!