"Hunter, who was a sergeant first class when he left the Army, had served as an air-assault and airborne-infantry squad leader, a sniper instructor and a drill sergeant, the charges say. Vamvakias attained the rank of sergeant after having served in South Korea and Puerto Rico. Both left the Army in 2004. Since then, the charging documents say, "Hunter has acted as a 'contract killer'; for pay, he has succeeded in arranging for the murder of a number of people." "