On the 31st of May 2014 12-year-olds Anissa E Weisser and Morgan Geyser lured their friend Payton Leutner into the woods and stabbed her 19 times during a game of hide and seek, before leaving her for dead. Leutner would survive the attack, and the murderous pair would soon be arrested. The reason they gave for their violent assault was a sinister and unbelievable one: they did it for Slender Man.