Iosif Romualdovich Grigulevich (Russian: ????? ???????????? ??????????; May 5, 1913 – June 2, 1988) was a Soviet NKVD Operative between 1937 and 1953, when he took a leading role in assassinating Communist and Bolshevik individuals who were not loyal to Joseph Stalin.Under a false identity as Teodoro B.
Castro, a wealthy Costa Rican expatriate living in Rome, Grigulevich served as the ambassador of the Republic of Costa Rica to both Italy and Yugoslavia (1952–1954).
His mission as an agent was to assassinate Yugoslav leader Josip Broz Tito but was later aborted by Stalin's death in 1953.
Grigulevich then settled in Moscow, where he worked as an expert on the history of Latin America and on the Roman Catholic Church.
He was a member of the Soviet Academy of Sciences, served as editor-in-chief of the magazine Obshchestvennye nauki i sovremennost ("Social Sciences Today"), and published many books and articles about Latin American subjects.