Isabella Guzman was a difficult child for her divorced parents to raise; however, they did their best to support and love her. But as the years grew on, she became more and more difficult to handle. Her mother, Yun-Mi Hoy, particularly struggled with her and eventually reached her breaking point. She called the cops on her daughter, hoping they'd talk some sense into her. It not only didn't work, but it appeared to make things worse. That same evening, Isabella locked herself and her mother in their bathroom and did the unthinkable... meanwhile, her stepfather was downstairs able to hear the entire attack. After ending her mom's life, Isabella went on the run but was quickly found by police. She ultimately pleaded not guilty by reason of insanity, given that doctors diagnosed her with schizophrenia. She's remained in the Colorado Mental Health Institute in Pueblo, Colorado since the murder, although she has begun petitioning for her release.