Assassinations may be ordered by both individuals and organizations and carried out by their accomplices. Acts of assassination have been performed since ancient times. A person who carries out an assassination is called an assassin. [4]
1. a murderer, esp. one who kills a politically prominent person for fanatical or monetary reasons. 2. (cap.) one of an order of Muslim fanatics, active in Persia and Syria c1090–1272, whose chief object was to assassinate Crusaders.