Grand Junction, Colorado, 2001: When Michael Blagg's adoring wife, Jennifer, and his six year-old-daughter, Abby, disappeared from their home, Michael led the charge to find them, even going so far as to make a nationwide appeal on Good Morning America for information. But seven months later, investigators found Jennifer's remains in a Mesa County landfill, and things took a darker turn...

Jennifer had been shot in the head, investigators discovered, and Abby was nowhere to be found. While Michael, a respected prayer-group leader, played the part of grieving survivor,...