Over the years, there have been a number of myths (including the Bogeyman) used to scare children. A new myth has been created, The Slender Man, that provoke kids to commit acts of murder.
The Slender Man started in 2009 as a thread on the Something Awful[1. http://www.somethingawful.com/] or “SA” comedy website created by Richard “Lowtax” Kyanka[1. Lynch, Steven G. “Rich “Lowtax” Kyanka”.]. The Slender Man character quickly took a life of its own.
Somehow, from such innocuous beginnings, Slender Man became the catalyst for two pre-teen girls to attempt murder as a ceremonial act of service to this fictional character[1. Gabler, Ellen (June 2, 2014). “Charges detail Waukesha pre-teens’ attempt to kill classmate“. Milwaukee Journal Sentinel.].
An article in Rolling Stone Magazine[1. http://www.rollingstone.com/culture/news/images-from-slender-man-stabbing-suspects-notebook-surface-20150219] provides additional details… including images from the girls’ notebook and a Barbie doll with ceremonial markings[1. http://assets.rollingstone.com/assets/2015/article/images-from-slender-man-stabbing-suspects-notebook-surface-20150219/186622/medium_rect/1424377035/720×405-SlenderMan.jpg]. You can see even more at The Blaze.
For information on the two girls who attempted to murder their classroom, follow the NBC News Timeline. Meanwhile, a happy note on the story of the girl they tried to murder can be read at People Magazine.