MADISON, Wis. -- A Wisconsin woman who admitted to nearly stabbing a classmate to death in 2014 to please the online horror character Slender Man is missing after she cut off an electronic monitoring device and left a group home, authorities said Sunday.

The video in the player above is from a previous report.

Madison police issued an alert Sunday for Morgan Geyser, now 23, saying she was last seen around 8 p.m. Saturday with an adult acquaintance.

"If you see Geyser, please call 911," the alert said, adding that she had cut off a "Department of Corrections monitoring bracelet."

Geyser was placed in a group home this year after being granted conditional release from the Winnebago Mental Health Institute. She was sent to the psychiatric institute in 2018 after pleading guilty to at

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