With these notorious killers, the disturbing details just keep coming ...

Lesson #3: Shut your mouth.

Everyone remembers the bloody glove, but do you the name of the serial killer who actually confessed to the infamous murder of Nicole Brown Simpson?

What could lead a mother to hurt her own children?

Viewer beware: These freaky videos are guaranteed to give you nightmares.

From the Devil's tramping ground to a wooded Bermuda Triangle, you do not want to take a stroll through these freaky forests.

Ghost trains, "hell hounds," and glowing gravestones haunt this tiny, abandoned prairie town that supposedly contains a stairway to hell.

Get pumped for the new mini-series coming in January.

From a would-be presidential assassin to the decades-old "watcher" of a house in New Jersey.

The brutal slayings shocked the citizens of Australia and beyond. 

These nightmarish tales of real-life roller coaster deaths will have you rethinking that summer trip to the amusement park.

Forget runny noses or messy diapers—the real nightmare of parenting is a spine-chilling encounter with your child's creepy imaginary friend.

From the cobblestone paths of Pere-Lachaise to a quiet Kansas graveyard that hides a gate to Hell, these creepy cemeteries are definitely worth a trip.

Jason was originally named "Josh." The skeletons in Poltergeist are real. And many more things you never knew about your favorite horror films.

Even toddlers can help solve crimes.