ERWIN — A state trooper responding to a call about a suicidal and possibly armed man barricaded in his home near the Pennsylvania border early Monday was fatally shot along with the man, a school principal, officials said.Trooper Nicholas Clark was among responders to a 3:30 a.m. 911 call from the estranged wife of Steven Kiley, state police First Deputy Superintendent Chris Fiore said at a news conference attended by Gov.