Mystery

Frightened citizens sealed their windows when reports of mysterious gas attacks spread from house to house. Could a mad gasser be on the loose?

After poisoning his wife, Herbert Armstrong set his sights on a rival lawyer. But when his target just wouldn't die, Armstrong's toxic methods turned messy.

In 1940s Africa, Josslyn Hay slept with the wrong woman and ended up dead. More than 70 years later, theories about the murderer are still emerging.

When a mugger tried to snatch his wallet – and photos of his grandchildren – Arthur Kamberis took matters into his own hands.

This Hungarian fiend lured dozens of women to his village home with promises of love – then strangled each victim and pickled their bodies in metal drums.

In 1958, Johnny Stompanato was stabbed to death in Lana Turner's Beverly Hills home. Was this a case of tinsel town murder or justifiable homicide?

This wealthy recluse owned numerous palatial estates – all of which sat empty for decades while she remained locked in her small hospital room.

The enchanting death mask of an unknown Parisian woman finds life after death as the inspiration to countless writers, painters, and artists.

Lydia Sherman swore she never meant to poison her third husband – just his children and the dead men of her previous marriages.

From an obsessive poisoner to a couple of teenage girls out to have "fun," these youngsters aren't as innocent as they look.

Their songs live on ... but the events surrounding their tragic deaths remain a mystery.

Most people know not everything on the Internet is true – these people learned it the hard way.

What happened to this hardworking college student, who had so many loving friends and family?

Meet Scotland's legendary cannibal killer, who along with his ravenous cave-dwelling clan dined on the flesh of 1,000 victims.

It's hard to keep your eyes open while reading these shocking scissor crimes.

Meet the mind behind the Cold Case Investigative Research Institute, a real-life detective club that tackles unsolved murders throughout history.

In 16th century Rhineland, something – or someone – was slaughtering villagers by the glow of the full moon.

Mary Jane Heaster was devastated by the mysterious death of her daughter Zona – until Zona's spirit appeared in the night to tell her she'd been murdered.

Meet Lavinia and John Fisher, the legendary deadly couple who makes Bonnie and Clyde look like rebellious teenagers.

It was New Jersey's first public mental institution – and the place where one mad doctor's brutal methods turned the facility into a hospital of horrors.