A 1994 Warren County High School graduate was among four soldiers killed last week when an Army helicopter crashed in Texas.According to information released from Fort Hood in Texas, 40-year-old Stephen B. Cooley was killed last Monday, Nov. 23, when his Black Hawk helicopter crashed during what has been called routine training exercises. Cooley is listed as a chief warrant officer 3.The Army’s initial report included few details. When contacted Monday by the Standard, military officials said no additional information is being released.The helicopter crashed around 6 p.m. last Monday on the sprawling Fort Hood base that covers 214,000 acres.