A recent image provided from the Madison Police Department of Morgan Geyser, captured on security video from this past month. Madison Police Department

A woman who stabbed her sixth-grade classmate to win favor with a fictional internet character named “Slender Man” more than a decade ago left a group home where she’d been living after cutting off her Department of Corrections monitoring bracelet, Wisconsin police said.

Morgan Geyser, 23, was last seen in a residential neighborhood in the west side of Madison around 8 p.m. with an adult acquaintance, according to police.

“Her whereabouts are unknown as of Sunday morning,” Madison Police said in a statement.

Geyser and her friend Anissa Weier, both 12 at the time of the crime, lured their 12-year-old classmate into a park in Waukesha

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