‘Slender Man’ stabber back in custody. What we know about her disappearance and the internet boogeyman who inspired her

(CNN) — On a chilly Saturday night, Morgan Geyser left the group home where she was living in Madison, Wisconsin, and met up with an acquaintance on a quiet residential street nearby.

Before she vanished, police say the 23-year-old cut off the monitoring bracelet law enforcement used to track her whereabouts, years after she pleaded guilty to attempted murder in the “Slender Man” stabbing of her 12-year-old classmate.

CNN’s Chris Boyette, Dakin Andone, Doug Gross, Faith Karimi, Alex Stambaugh and Karina Tsui contributed to this report.