A judge has ordered a second mental health exam for a man accused of stabbing a student at Husson University.Police say 45-year-old Horst Wolk stabbed his wife on the school’s Bangor campus in May. She was cut on her leg and neck. Wolk pleaded not guilty to attempted murder and aggravated assault. Thursday his lawyer asked for another psychological exam. Prosecutors say a first exam found Wolk competent to stand trial. Wolk was returned to Penobscot County Jail and is due back in court in April.