The Unabomber's reign of terror lasted for 17 years and sparked the biggest manhunt in FBI history. But what drove Ted Kaczynski to murder?

Why the motives for the Columbine High School shooting had nothing to do with bullying or revenge — and why the real truth is even more disturbing.

Discover the true story of "Murder Among the Mormons," from Mark Hofmann's white salamander letter forgery to his 1985 bombings.

Shiro Ishii ran Unit 731 and performed cruel experiments on prisoners until he was apprehended by the U.S. government — and granted full immunity.

After the war, many Japanese soldiers claimed they only ate human flesh because they were starving. But in most cases, the evidence tells a different story.

For Watergate ringleader E. Howard Hunt, the crimes he committed on behalf of Richard Nixon pale in comparison to the crimes he committed on behalf of his country.

Starting with its first street gang in the early 1800s and continuing with its most recent mob boss assassination in March 2019, New York's history of gangs is as gruesome as it is complicated.

In 1932, a reclusive hunter named Albert Johnson opened fire on Canadian police — and then tried to flee into the icy mountains of the Northwest Territories. To this day, no one knows why.

For better food, a separate room, and protection from hard labor and the gas chamber, some prisoners became kapos — but they had to beat their fellow inmates in return.

Body snatching at the dawn of the Scientific Revolution was so lucrative that some career graverobbers actually murdered people to satisfy the market.

Today, H.H. Holmes lives on in infamy as "America's First Serial Killer," but how much of the story we've been told is the result of tall tales, yellow journalism, and bad fact-checking?