Authorities say a Wisconsin woman who admitted to nearly stabbing a classmate to death in 2014 to please the horror character Slender Man is missing after she cut off an electronic monitoring device and left a group home. Madison police issued an alert Sunday for Morgan Geyser saying she was last seen around 8 p.m. the night before with an adult acquaintance. Police urged the public to call 911 if they see the 23-year-old woman. Geyser was placed in a group home after being granted conditional release from psychiatric hospital. She was sent there in 2018 after pleading guilty to attempted first-degree intentional homicide.