Khalid Ahmed Showky El Islambouli (, ) (15 January 1955 – 15 April 1982) was an Egyptian army officer who planned and participated in the assassination of Egyptian President Anwar Sadat, during the annual 6th October victory parade on 6 October 1981. Islambouli stated that his primary motivation for the assassination was Sadat's signing of the Camp David Accords with Israel and Sadat's plan for a more progressive Egypt. Islambouli was tried before an Egyptian court-martial, found guilty, and sentenced to death by firing squad. Following his execution, he was declared a martyr by many radicals in the Islamic world, and became an inspirational symbol for radical Islamic movements as one of the first 'modern martyrs of Islam'.