Movies and TV shows about crime are suspenseful enough on their own. But when they're based on true stories, it can be downright terrifying. That's especially true for movies and TV shows inspired by real-life unsolved murders.Stories about figures like Jack the Ripper and the Zodiac Killer have lived on for decades, inspiring multiple movies, TV episodes, and books. It's not just the serial killings that are frightening — it's the fact that the killers actually got away with it. Our human desire to pin their crimes on someone, anyone, has led to the ridiculous claims that Ted Cruz and Bernie Sanders could be the Zodiac Killer , despite a wealth of evidence to the contrary.We've rounded up some of the most frightening unsolved murder stories throughout history and some of the movies and TV shows that they've inspired. Click through, if you dare.