The frightening power of the Slenderman

A new HBO documentary explores how an imaginary internet spook drove two pre-teens to near-murder

From the HBO documentary, "Beware the Slenderman"
(Image credit: HBO via AP)

On the morning of May 31, 2014, in Waukesha, Wisconsin, a 12-year-old girl covered in blood crawled from the woods after being stabbed 19 times and left for dead by her "best friend" and another classmate.

The vicious attack, carried out by pre-teens Morgan Geyser and Anissa Weier, had been months in the making, and the unbelievable motive behind it reverberated from neighborhoods to newsrooms around the world: A mysterious (and obviously imaginary) bogeyman called "Slenderman," created and popularized on the internet, had inspired two sixth-graders to kill in his name.

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Russ Espinoza is an entertainment correspondent at TheWeek.com. His work has appeared in The Austin Chronicle, Austin Monthly, and 5280 Magazine.