` ` Slenderman '' character allegedly encouraged 12-year - old girls to stab a classmate . Slenderman was born in 2009 in an online community for people who create fake supernatural images . He 's featured in fan art , short stories , videos , and games on Facebook . Police : Girls claims the attack was done to impress the fictitious bogeyman .
`` Slenderman '' character allegedly inspired 12-year-old girls to stab a classmate . Slenderman was born in 2009 in an online forum for people who create fake supernatural images . He 's appeared in fan art , short stories , videos , video games on Web . Police : Girls said the attack was meant to impress the fictitious bogeyman .