William Calley
He was held responsible and found guilty of some of the killings of the My Lai massacre during the Vietnam War. Of the 26 officers and soldiers that were charged for their part in the My Lai Massacre or the  cover-up, only Calley was convicted. He was sentenced to a life in prison, but that was changed to 20 years in prison, and later to 10 years in prison. He was put on house arrest instead. Calley only spent three years on house arrest, and was then released.