“Most people are nice.” That’s a phrase you hear a lot, isn’t it? It’s the sort of thing you find written on dream journals and fridge magnets. But the world is a big old place. There’s an awful lot of humans kicking about. Statistically speaking, quite a fair few of them have to be sadistic to the extreme. Thanks to the rise in popularity of things like True Crime Podcasts, we all know just how awful some people are. But consider this: Those are only the criminals the authorities are willing to let us know about. There are some so depraved, the public are never told for fear of how we’d react. Brace yourself: It’s time for the worst of the worst. These are the 20 most cruel people the FBI doesn’t want you to know!

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