Five-year-old Haleigh Cummings mysteriously disappears overnight from her home near Jacksonville, Florida, after her dad's girlfriend puts her to bed. Was Haleigh abducted or did something else happen?

Newlyweds Jessica and Matthew Boynton seemed like the picture-perfect couple -- until the young mother is found unresponsive and covered in blood inside her locked bedroom closet.

A family camping trip to the remote Idaho mountains turns into something out of a horror movie when 2-year-old DeOrr Kunz disappears. At first, it looks like he may have been abducted, until other disturbing theories start to emerge.

Beautiful mom Michelle Parker appears on an episode of "The People's Court," fighting with her ex-fiancé over a diamond engagement ring. But hours after that episode airs, Michelle mysteriously vanishes.

College student Elisa Lam checks into a Los Angeles hotel -- but never checks out. The last known images of the young tourist are from the hotel's elevator security camera. Later, her naked body is found floating face-up in the hotel's rooftop water tank.