Here are genuine facts about some of these horrific serial killers and creepy stories . From slenderman and Jeff the killer to SCPs and horrifying stories, here are facts that just might have you learn a new thing or two. Authors note: These are not Canon, but actual things I've had in interest while researching these stories or characters. Leave a comment on what fact you want me to do, or what you think about stories/characters. All in all enjoy!