CLAYTON, Mo. — The St. Louis County police have arrested a suspect in connection with the shooting of two police officers outside the Ferguson Police Department early Thursday morning, a police spokesman said Sunday. The police and prosecutors have scheduled a news conference later Sunday to announce the arrest. The two officers — one from the county police and the other from the nearby Webster Groves department — were standing shoulder to shoulder as part of a protective line facing demonstrators across the street from the police station. At least three gunshots came from a distance behind the demonstrators, as...