Authorities charged John W. Mallett with four counts of felonious assault on Thursday, a day after he entered a building that houses a college and other offices and stabbed four men.
Police say the attack by the 37-year-old Mallett, who had no criminal record in Columbus, appears to be random,
They say an aunt in Columbus told police that she thought the suspect was Mallett. She told police he was mentally ill and had been off his medications.
