If you’ve never heard of these criminals, consider yourself lucky. For this list, we’ll be looking at the freakiest and most depraved serial killers that don’t often get mainstream attention. Our countdown includes Gerard John Schaefer, Salvatore Perrone, Karl Denke, and more! Which of these killers do you find the scariest? Let us know in the comments below!
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Top 20 Crime Movies of the Century (So Far): https://youtu.be/G3BDNgNnq-g
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