Circuit Judge Richard Perkins made the ruling Monday, after two out of three court-appointed mental health experts determined that Claudia Warner-Gonzales, 62, is unable to understand the proceedings against her.
Defense attorney Sam King, Jr. says all three of the doctors agreed that his client was mentally impaired at the time of the fatal stabbing and, therefore, should not be held criminally responsible.
Police say Warner-Gonzales' brother found their mother, Dorothy Stribling, 88, with a knife lodged in her shoulder and called 911. An autopsy later revealed Stribling died from a stab wound to the chest.
King says his client has a long history of mental illness, including schizophrenia, and was scheduled to increase her medication the day of the deadly attack. In April, Warner-Gonzales was transferred from the Oahu Community Correctional Center to the Hawaii State Hospital in Kaneohe because the staff at the jail couldn't handle her mental health needs, King said.