Eleven years after the terrifying “Slender Man” stabbing, Morgan Geyser has sparked shock all over again. In a move that left authorities scrambling, Geyser slipped out of her group home and cut off her ankle monitor, disappearing before anyone realized what was happening. The moment news broke, it felt like a scene straight out of a late-night true-crime special—sirens blaring, alerts flashing, and people asking how something like this could even happen.
One of the “Slender Man stabbers” — who viciously ambushed and hacked a classmate when she was 12 years old in an effort to please a made-up internet boogeyman…