What happened to 16-year-old Theresa Bier in the remote forests of central California? For locals, it's one of the strangest missing person cases of a lifetime. They'll tell you Bigfoot took her – but Jessica Chobot and Robert Collier believe there is more to the story. 

The search for Theresa takes a dramatic turn, and an unsuspecting family's home becomes a potential crime scene. While new evidence emerges that could change the entire case, a final witness steps forward with heartbreaking new details.