HARRISBURG (AP) — Authorities say a Pennsylvania state trooper shot and killed a man who refused to drop a knife. Troopers responded to a domestic complaint in West Hanover Township on Sunday. Authorities say 59-year-old Glenn Custer of Harrisburg was acting erratically and was armed with a knife. Authorities say Custer disobeyed commands to drop the knife and was moving toward a trooper and toward the residence where the domestic complaint had been made. Another trooper opened fire. Custer was pronounced dead at the scene. The shooting is under investigation.