A history of mental illness, a suicide attempt Foss High School, Tacoma, Wash., Jan. 3, 2007-- Students evacuate the building after an early morning shooting that left one student dead. Douglas Chanthabouly, 18, accused of the fatal shooting of his fellow student in a high school hallway, had a history of mental illness, possibly schizophrenia, according to a report from a mental health expert. Chanthabouly pleaded not guilty to first-degree murder. Police said he admitted to killing Samnang Kok, but refused to say why. Penny Hobson of Pierce County Jail's mental health staff interviewed Chanthabouly after his arrest and wrote that he was confused at times, somewhat depressed and having hallucinations. He "appears to have difficulty with concentration" and said he has trouble remembering things since he began suffering psychotic symptoms about two years ago, she wrote. She said he was admitted to a psychiatric hospital two years ago after attempting suicide.