MADISON, Wis. – In a troubling turn of events, Morgan Geyser, the Wisconsin woman who became infamous for her involvement in the 2014 Slender Man stabbing case, is now missing after reportedly tampering with her electronic monitoring device and leaving a group home, according to authorities on Sunday.

Madison police have released an alert regarding Geyser, now 23, who was last seen on Saturday evening around 8 p.m., accompanied by an adult acquaintance. The alert emphasizes the urgency of the situation, stating, “If you see Geyser, please call 911,” and highlighting that she had removed a “Department of Corrections monitoring bracelet.”

Geyser’s recent residence at the group home comes following her conditional release from the Winnebago Mental Health Institute earlier this year. This release was part of an arrangement after she pleaded guilty to attempted first-degree intentional homicide in 2018, a plea that allowed her to avoid prison by being committed to the psychiatric facility.

Despite the gravity of the situation, Geyser’s legal representative, Tony Cotton, has yet to provide any comments or responses to inquiries made on Sunday.

The origins of this case trace back to when Geyser, at just 12 years old, along with her friend Anissa Weier, attracted national attention for luring their classmate, Payton Leutner, to a park in suburban Milwaukee following a sleepover. In a chilling act, Geyser stabbed Leutner multiple times, with Weier encouraging her actions. Miraculously, Leutner survived the brutal attack.

Authorities say Geyser and her friend, Anissa Weier, were 12 years old when they lured their classmate, Payton Leutner, to a suburban Milwaukee park after a sleepover. Geyser stabbed Leutner more than a dozen times while Weier egged her on. Leutner barely survived.

The girls later told investigators that they attacked Leutner to earn the right to be Slender Man’s servants and they feared he’d harm their families if they didn’t follow through.

Slender Man was created online by Eric Knudson in 2009 as a mysterious figure photo-edited into everyday images of children at play. He grew into a popular boogeyman, appearing in video games, online stories and a 2018 movie.

Weier pleaded guilty to attempted second-degree intentional homicide. She was also sent to the psychiatric center and granted release in 2021.