Webisabella guzman was 18 years old when police say she brutally stabbed her mother to death at her mother's home in aurora in 2013. She pleaded not guilty by. Webupdate, 10:21 a. m. The aurora police department has just announced that isabella guzman, eighteen, has been formally charged with murdering. Webin august 2013, isabella guzman brutally murdered her mother yun mi hoy — then became famous online while being held in the colorado mental health institute. Webisabella guzman stabbed yun mi hoy 79 times at their home in aurora. She was 18 at the time, and was later found not guilty by reason of insanity. Webin 2020 isabella tried to be released from the mental health facility she has lived in for all of this time stating, “i’m not mentally ill anymore. I’m not a danger to myself. Webisabella guzman's release date is still unknown, although, in june 2021, she was granted permission to leave the hospital for therapy sessions.