Isabella Guzman , 18, allegedly killed her mother by stabbing her 79 times in her face and neck in Colorado, USA, on August 28, 2013. Isabella Guzman began trending after the video of her trial was uploaded on social media. Find out more info about her murder case, illness and where she is now. Isabella Guzman is an American who stabbed her mother to death in 2013 and claimed insanity. She is still in a mental health facility in Colorado and has not been released yet. Isabella Guzman , who stabbed her mother to death in 2013, has secured conditional release from the mental health institution and plans to reintegrate into society. She claims she was sexually assaulted by a hospital employee and suffered abuse from her Jehovah's Witness family.