 Colonel Lê Quang Tung ( 1923 – 1 November 1963 ) was the commander of the Army of the Republic of Vietnam Special Forces under the command of Ngô Đình Nhu . Nhu was the brother of South Vietnam 's president , Ngô Đình Diệm . A former servant of the Ngô family , Tung 's military background was in security and counterespionage . 
