Video: The creepy story of the Slender Man stabbing unfolds in the trailer for HBO’s new documentary about the meme that inspired two Wisconsin pre-teens to try and murder their classmate!
Two years ago, the world was left stunned after a 12-year-old girl was stabbed 19 times by her two closest friends after being lured out into the woods during a slumber party. According to the pair, who have both been diagnosed with mental illness, they were told to commit the atrocious crime by the infamous internet creation, Slenderman.
