In April, after being chased by police from Alexandria, Va., who thought someone in his car had shot at a building in Old Town, Anthony Louis crashed on a highway overpass in the District and then fled on foot over a Jersey barrier, falling 23 feet to the road below.There, the 35-year-old was struck with a stun device by a U.S. Park Police officer and restrained with the help of officers from Alexandria, according to Alexandria police. Louis, a father of three, died later that night.