On 21 May 2004, a US military court sentenced Staff Sergeant Camilo Mejia Castillo of the Florida National Guard to the maximum penalty of one year’s imprisonment for desertion. He had refused to return to his unit in Iraq, citing moral reasons, the legality of the war and the conduct of US troops towards Iraqi civilians and prisoners. Amnesty International considers him to be a prisoner of conscience, imprisoned for his conscientious opposition to participating in war.