M organ Geyser, who in 2014 stabbed a friend 19 times to appease the fictional character "Slender Man," was located Sunday night after she allegedly cut off her Department of Corrections monitoring bracelet and left a Wisconsin group home where she had been a resident, authorities said.

Department of Corrections monitoring bracelet. She had last been seen in the area of Kroncke Drive around 8 p.m. with an adult acquaintance, according to Madison police. It remains unclear why 12 hours passed between when she was last seen and when police and the public were notified.

Police are searching for Morgan Geyser, one of the perpetrators in the 2014 Slender Man stabbing, after police said she cut off a Department of Corrections monitoring