A former teacher from St. Landry Parish, accused of a knife attack on his 6-year-old stepson, is claiming insanity. Patrick Greene, 37, appeared in court on Thursday, November 6, where he entered a plea of not guilty by reason of insanity. The judge ordered him to be held without bond. Greene is accused of stabbing Korbin Price, 6, during a domestic disturbance at a house in Leonville over the summer. Price, a young cancer survivor, suffered critical injuries to his face, neck, head, and chest and was hospitalized for weeks…