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Slender Man’ Attacker Morgan Geyser Detained in Illinois After Cutting Off Ankle Monitor

She had been on supervised release in a Madison group home following years of psychiatric commitment tied to the 2014 stabbing case.

Overview

  • Police say the 23-year-old removed her electronic monitor Saturday night and left her Madison residence, last seen around 8 p.m. on Kroncke Drive with a known adult.
  • Madison police issued a public alert urging people not to approach her and to call 911, and they released a recent security image to aid the search.
  • Authorities later confirmed around 10:34 p.m. Sunday that Geyser was detained in Posen, Illinois, after being found asleep at a truck stop with another person, and both were taken into custody.
  • Geyser previously pleaded guilty to attempted homicide but was found not criminally responsible due to mental illness, leading to a 2018 commitment to Winnebago Mental Health Institute and a supervised release granted this year.
  • Her attorney, Tony Cotton, had publicly urged her to surrender and said he did not know how she left the residence or whether anyone assisted her.