4 people,a doctor, police officer, pharmacy resident and the gunman, are dead after a shooting at Chicago’s Mercy Hospital. Authorities say it apparently stems from a domestic relationship between the gunman and doctor. It’s not clear if the shooter took his own life or was killed by police. Meantime, a prisoner disarmed a corrections officer inside a hospital in Kingston, Ontario and fired 2 shots before being subdued. One person suffered a serious injury.