Slender Man is a fictional entity created on the Something Awful online forums for a 2009 Photoshop paranormal image contest. The Slender Man myths were later expanded by other people, who created fan fiction and artistic depictions of the entity. Slender Man is a tall, thin character, with a featureless white face and head. He is depicted as wearing a black suit, and is sometimes shown with tentacles growing out of his back. According to the Slender Man myths, the entity can cause amnesia, bouts of coughing, and paranoid behavior in individuals. He is often depicted hiding in forests. 

 On May 31 2014 in David's Park, in a wooded area near Waukesha, Wisconsin, perpetrators,  13 year old Anissa Weier and 14 year old Morgan Geyser pinned down 14 year old Payton Isabella Leutner and stabbed her nineteen times. Leutner survived the attack. When Leutner learned why Geyser had stabbed her, she said, she wasn't surprised by the motive: The girls had intended to kill her to appease the fictional character "Slender Man" and prove that he was real.