Slender Man Attacker Found After Escaping Wisconsin Group Home

Slender Man Attacker Morgan Geyser Found After Escaping Wisconsin Group Home

Slender Man attacker located outside Chicago area after fleeing Wisconsin group home.

Published November 24, 2025

The search for a Wisconsin woman involved in the Slender Man stabbing ended Sunday night after police located her sleeping at a truck stop in Illinois.

After escaping a Madison-area group home, Morgan Geyser—one of the two girls convicted in the Slender Man stabbing—was located by police dispatched to the area for reports of two individuals loitering at a truck stop in Posen, Illinois. Geyser was found with a 42-year-old man who was charged with criminal trespassing and obstructing identification, according to the Posen police.

Geyser was one of two women convicted of stabbing their sixth-grade classmate to please a fictional character called Slender Man, who’d become popular after his creation in 2009.

Geyser pleaded guilty to attempted first-degree intentional homicide after the 2014 stabbing. She was sent to the Winnebago Mental Health Institute in 2018 before a conditional release allowed her to be placed in a group home in the Madison area.

Geyser had been on the Madison Police Department’s (MPD) radar after she had cut off her electronic monitoring device and left the group home on Saturday evening. Around 9:30 p.m., the Department of Corrections received notification that Geyser’s monitoring device was malfunctioning.

By 11:35 p.m., the group home staff informed the department that Geyser was not at the home and had removed her bracelet. According to MPD, she was last seen at the home around 8:15 p.m. Saturday.

MPD reported that at 10:34 p.m. they received confirmation that Geyser was in custody in the state of Illinois and they no longer needed to search for her. (RELATED: Marathon County Enters Into Agreement To Handover Illegal Aliens to ICE)

Retired FBI Agent and contributor for NewsNation Jennifer Coffindaffer responded to the story on X, calling attention to the “bad decision” by a Waukesha County Judge who allowed Geyser to live in low security housing.

If a 12 YO girl opts to lure her friend into the woods and stab her 19 times (with another friend) because Slender Man told them to, an ankle monitor between the 12 YO attempted murderer and the rest of society isn't enough.

Again, another bad decision by a judge that helped an… pic.twitter.com/7SUw08XyhW
— Jennifer Coffindaffer (@CoffindafferFBI) November 23, 2025

Waukesha County District Attorney Lesli Boese held a press conference expressing her support for the Department of Health Services (DHS) to revoke Geyser’s conditional release. She also indicated that her associate had “argued vehemently” against granting that release in the first place.

It remains to be seen whether DHS will file a petition to revoke Geyser’s conditional release following this weekend’s events. (RELATED: Drugged Driving on the Rise in Wisconsin as Marijuana Legalization Expands Nationwide)