Hide the kids! ‘Slender Man’ is lurking: Hollywood cashing in on villain who has already scarred 3 children for life

It was a hot August day in 2014 when Anissa Weier and her friend Morgan Geyser, both 12 years old, lured another 12-year-old girl, Payton Leutner, to a wooded park in the Milwaukee suburb of Waukesha.

There Geyser stabbed Leutner 19 times, while Weier urged her on.

Leuter only survived the attack by crawling out of the woods to a path where a passing bicyclist found her.