Ivan Ksenofontov
Ivan Ksenofontovich Ksenofontov (Russian: Иван Ксенофонтович Ксенофонтов; August 29, 1884 – March 23, 1926) was a Bolshevik revolutionary and one of the founders of the Soviet secret police and state security agency, the Cheka (later GPU and OGPU).
He gained notoriety as Chairman of the Supreme Revolutionary Tribunal and later as First Deputy Chairman of the Cheka, the agency's "number two" under Felix Dzerzhinsky, where he played a decisive role in crushing various anti-Bolshevik factions and the Kronstadt uprising. An early supporter of Joseph Stalin, he was described as Stalin's "mole" in the security services.