Charleston Hartfield, an off-duty Las Vegas police officer and recently published author of a memoir about life on the force, was killed Sunday night in the mass shooting on the Strip. Hartfield, a 34-year-old military veteran known as Charles, Chucky or “ChuckyHart,” also coached youth football Hartfield was a sergeant 1st class in the Nevada Army National Guard, assigned to the 100th Quartermaster Company, based in Las Vegas. Brig. Gen. William Burks, adjutant general of the Nevada National Guard, called him “the epitome of a citizen-soldier.”