Police are currently searching for Morgan Geyser, one of the girls involved in the 2014 Slender Man-inspired stabbing, after she recently went missing.

Geyser, now 22, left her group home in Madison, Wis., and cut off her Department of Corrections monitoring bracelet, per a statement from the Madison Police Department (MPD) shared on Facebook on Sunday, Nov. 23.

Geyser was last seen on Saturday, Nov. 22, “in the area of Kroncke Dr. around 8 p.m. [local time] with an adult acquaintance,” per the statement. Police said that her whereabouts are currently unknown, and that the MPD “was notified of her disappearance” on Sunday morning.

The MPD shared a recent image of Geyser captured on security video and asked anyone who sees her to call 911.

Slender Man Stabbing Attacker Morgan Geyser Is Missing, Removed Her Police Tracker

Security camera footage of Slender Man attacker Morgan Geyser.Madison Police Department/Facebook

In an emailed statement to PEOPLE, the MPD said Geyser had yet to be located at the time of writing, but that the department will “investigate every community tip or sighting reported to us.”

In 2014, Geyser and her friend Anissa Weier lured their classmate Payton Leutner into the woods during a sleepover while playing a game of hide and seek in their Milwaukee suburb. Geyser then stabbed Leutner 19 times while Weier cheered her on.

Leutner survived the attack and was rescued by a passerby after she crawled her way into a nearby bike path. All of the girls were 12 years old at the time.

Morgan Geyser, Anissa Weier

Morgan Gesyer; Anissa Weier.Waukesha Police Department  (2)

Geyser and Weier said that they committed the crime to please the mythical figure Slender Man, whom they believed was real at the time. The Slender Man character is believed to have originated from a 2009 illustration of a tall, thin man with tentacle-like arms and magical abilities that circulated around the Internet via horror stories.

Both Geyser and Weier were charged with first-degree intentional homicide and were tried as adults, despite their ages.

Both girls were eventually found not guilty by reason of mental disease or defect and were committed to psychiatric facilities.

In January, 11 years after the attack, it was announced that Geyser would be released from her psychiatric care facility following expert testimony claiming that she had made noticeable progress during her time there, per the Associated Press. The judge ordered Wisconsin’s Department of Health Services to house her in a group home as a condition of her release.

Weier was released in 2021 after being housed for nearly four years at the same facility as Geyser.