Russell Dermond's headless body is found in the garage of his million-dollar lakefront mansion. His wife, Shirley, is found floating dead in the water, her ankles tethered with cinder blocks. One key piece of evidence still remains missing.

After 7-year-old Kyron Horman's stepmother drops him off at a school science fair and takes a picture, the little boy is never seen again; his disappearance is one of the largest mysteries and investigations in Oregon's history.

Three young brothers are reported missing the day after Thanksgiving; in a shocking twist, their father claims he gave them to an underground group, but investigators say his story doesn't add up.