A Wisconsin woman who stabbed her friend more than a dozen times in 2014 to impress a shadowy fictional character named Slender Man is missing after she cut off a Department of Corrections monitoring bracelet and left a group home on Saturday night, the authorities said.
The woman, Morgan Geyser, 23, was last seen around 8 p.m. on Saturday with another adult in a residential area of Madison, Wis., the Madison Police Department said in a statement.
The police said they were notified of her disappearance on Sunday morning and immediately alerted the public. She remained missing as of Sunday evening.
“If you see her, please call 911,” the police said in the statement.
The Madison Police Department did not immediately respond to a request for comment.
In a video posted to social media, Tony Cotton, a lawyer for Ms. Geyser, said he did not know “any of the facts about what happened,” and urged Ms. Geyser to turn herself in.
“Do not continue to remain on the run like this,” Mr. Cotton said. “It is not in your best interest to handle this matter that way.”
Mr. Cotton also said that anyone who helped her would “be prosecuted to the fullest extent of the law.”
Ms. Geyser was placed in a group home this year after being granted a conditional release from the Winnebago Mental Health Institute.
She had been sentenced to the psychiatric hospital in 2018 after pleading guilty to a charge of attempted first-degree intentional homicide as part of a deal in which prosecutors agreed not to seek prison time.
Ms. Geyser had petitioned to leave the psychiatric center several times over the years, most recently in October 2024.
Judge Michael O. Bohren of Waukesha County Circuit Court granted her release in January, concluding after a hearing that she no longer posed a threat to herself or others.
Ms. Geyser and a classmate, Anissa Weier, lured their friend Payton Leutner, all of whom were 12 at the time, into a wooded area in Waukesha, Wis., on May 31, 2014.
Ms. Geyser stabbed Ms. Leutner 19 times with a kitchen knife while Ms. Weier watched and urged her on.
Ms. Leutner managed to crawl out of the area and was found by a cyclist. She survived her injuries after several months of recovery.
Ms. Weier pleaded guilty in 2017 to attempted second-degree homicide. A jury later found that she was suffering from a mental disorder at the time of the stabbing and she was committed to the Winnebago Mental Health Institute for 25 years. She was granted conditional release in July 2021.
Both Ms. Geyser and Ms. Weier were caught on their way to a mansion they believed belonged to Slender Man, a character from the internet often shown as a tall creature in a suit with a blank face.
The two later told the authorities that they had carried out the stabbing to appease the fictional character.
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