Judge accepts teen's insanity plea in murder of mother

19-year-old Isabella Guzman is accused of fatally stabbing her mother over 150 times



A follow-up on this horrifying case out of Colorado, where a 19-year-old woman, charged with first-degree murder after stabbing her mother over 150 times, has pleaded not guilty by reason of insanity.

Judge accepts Isabella Guzman's insanity plea; accused of stabbing mother 151 times

Isabella Guzman, who was 18 at the time, used a knife to stab her mother Yun-Mi Hoy in the face, neck, arms and torso in the bathroom of their home on August 28, 2013. According to police, 151 individual stab wounds were discovered on Hoy's body. She was also beaten with a baseball bat.

Guzman, who was arrested and charged with murder, was later diagnosed with paranoid schizophrenia. Based on evidence, the district attorney determined that Guzman did not know right from wrong.

75-year-old man pleads insanity in double murder case

James Pak is accused of fatally shooting two teenagers over parking dispute



Follow-up on this story out of Maine... This week in York County Superior Court, a 75-year-old man pleaded not guilty by reason of insanity in the fatal shooting of two teenagers in December 2012.

Biddeford landlord pleads insanity in killing of teens

James Pak faces two counts of murder in the deaths of 19-year-Derrick Thompson and 18-year-old Alivia Welch, who were shot to death in the apartment where Thompson lived with his mother, who was also wounded in the shooting, but survived. According to authorities, Pak shot them after a dispute over parking.

Pak had initially pleaded not guilty last year to two counts of murder. He is also accused of aggravated attempted murder and elevated aggravated assault for allegedly shooting Johnson's mother, and burglary for breaking into the apartment.