Slender Man stabbing

On May 31, 2014, in Waukesha, Wisconsin, United States, 12-year-olds Anissa Weier and Morgan Geyser stabbed their friend Payton Leutner. They tried to kill her in the woods to impress the internet character Slenderman, so that way he would not kill their families and allow them to become his servants. She survived, and was found by a cyclist.

Weier was sentenced to up to 25 years in a mental hospital, and Geyser was sentenced to up to 40.Source
 See also 
 Murder of Cassie Jo Stoddart

 References 

Category:2014 crimes
Category:2014 in the United States
Category:2010s crimes in the United States
Category:2010s in Wisconsin
Category:May 2014 events
Category:Violence in the United States