The suspect in the killing of a trooper and the critical wounding of another outside a rural barracks is a survivalist... Eric Matthew Frein, 31, of Canadensis, Pa., is still armed with the .308-caliber rifle that he used to open fire on the barracks late Friday, State Police Commissioner Frank Noonan said at a news conference where he revealed the suspect's name. Noonan called Frein "extremely dangerous." "