When An Insane Teen Killer Makes Detectives Snap

A popular true crime case featuring a woman named Isabella Guzman who murdered her mother, and then avoided a prison sentence by reason of insanity became a TikTok sensation in 2020. People have become absolutely enthralled with her story and court case.



Isabella Guzman was a teenager in Aurora, Colorado, in the early 2010s. According to CBS News reporting, despite Isabella’s long-existing behavioral issues, she was generally regarded as a happy and loving teen by her family.


In 2013, when Guzman was 18, her problems with behavior began to mount, especially in regard to her mother. Everything came to a head when Guzman murdered her mother via stabbing on August 28, 2013.


Guzman’s mother, Yun Mi Hoy, had been having many altercations with Isabella throughout the month of August. Leading up to her murder, Yun Mi Hoy had sought the intervention of both police and Guzman’s biological father to try and aid in stabilizing Isabella. Her outbursts had escalated to spitting and threats of getting revenge on her mother.


On the evening of August 28, 2013, Isabella Guzman followed her mother to her upstairs bathroom and Yun Mi Hoy began to shower. During this time, it’s not known what happened immediately before the murder. All we know is that Guzman’s stepfather heard a thud and scream upstairs, which led him to investigate and find the bathroom door being blocked by Guzman, with blood seeping under the door.

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