William Calley

William Laws Calley, Jr. (born June 8, 1943) is a former United States Army officer found guilty of murdering 22 unarmed South Vietnamese civilians in the My Lai Massacre on March 16, 1968, during the Vietnam War. After several reductions, Calley's original sentence of life in prison was turned into an order of house arrest, but after three years, President Richard Nixon reduced his sentence with a presidential pardon.