Morgan Geyser appears in a Waukesha County courtroom Jan. 9, 2025, in Waukesha, Wis. (AP Photo/Morry Gash, File) Police in the US state of Wisconsin on Sunday said a woman who had been missing from a group home since Saturday has been traced and taken into custody. The woman, identified as Morgan Geyser, had fled the group home in Madison where she was living after cutting off an electronic monitoring device.
The 23-year-old was one of the two women convicted in the ‘Slender Man stabbing’ in 2014, where she and her friend Anissa Weier stabbed a classmate, Payton Leutner.
All three were twelve years old at the time, and the two girls later claimed that they did it to please Slender Man, a fictional bogeyman character on the internet.
Anissa Weier and Morgan Geyser stabbed their friend 19 times to impress the "Slender Man". They were 12 years old. pic.twitter.com/ci9sxLLMnA
— Morbid Knowledge (@MorbidKnowledge) December 26, 2022
Geyser had claimed that she was convinced by Weier that Slender Man was going to hurt their families if they failed to carry out the stabbing.
The two girls took Leutner to a park in Waukesha, Wisconsin, on the pretext of a sleepover. Leutner, who was stabbed 19 times by Geyser, barely survived.
Weier and Geyser both pleaded guilty to attempted homicide. Geyser was sent to a psychiatric institute in 2018, and in March of this year, she was transferred to a group home in Madison.
She went missing from the group home on Saturday evening, and a manhunt was launched on Sunday morning.
Geyser’s attorney, Tony Cotton, said Sunday that he did not know what happened with his client and urged Geyser to turn herself in.
“It’s in her best interest for her to turn herself in immediately and not continue with this course of action,” Cotton said in an Instagram video post where he addressed Geyser directly at times. “We don’t know any of the facts about what happened or who might have assisted her.”
Late on Sunday, Madison Police confirmed that Geyser was found and taken into custody in Illinois.
Police in Posen, Illinois, told local media that Geyser was found with another person at a truck stop in the area and was taken into custody.
Morgan Geyser, convicted in the 2014 "Slender Man" stabbing case, was arrested after officers found her sleeping behind a truck stop in Posen, Illinois, following her escape from Wisconsin. https://t.co/71cGW3roT0 pic.twitter.com/yzPpLUnAZ4
— WISN 12 NEWS (@WISN12News) November 24, 2025
The Slender Man is a fictional, supernatural character that originated as an internet “creepypasta” meme in 2009. Slender Man was created by Eric Knudsen, who went by the username ‘Victor Surge’ on the Something Awful forums as part of a Photoshop contest to “create paranormal images.”

Slender Man, who is depicted as an unnaturally tall, thin humanoid with a featureless white head and face, typically wearing a black suit, quickly went viral, with other users also adding their own spins, giving the fictional character a life of its own.