Genrikh Grigoryevich Yagoda (Russian: Ге́нрих Григо́рьевич Яго́да, romanized: Genrikh Grigor'yevich Yagoda, born Yenokh Gershevich Iyeguda; 7 November 1891 – 15 March 1938) was a Soviet secret police official who served as director of the NKVD, the Soviet Union's security and intelligence agency, from 1934 to 1936. Appointed by Joseph Stalin, Yagoda supervised arrests, show trials, and executions of the Old Bolsheviks Lev Kamenev and Grigory Zinoviev, climactic events of the Great Purge. Yagoda also supervised the construction of the White Sea–Baltic Canal with Naftaly Frenkel, using penal labor from the gulag system, during which 12,000–25,000 laborers died. Like many NKVD officers who oversaw political repression under Stalin's rule, Yagoda himself ultimately became a victim of the regime's purges. He was demoted from the directorship of the NKVD in favor of Nikolai Yezhov in 1936 and arrested in 1937. Charged with crimes of wrecking, espionage, Trotskyism and conspiracy, Yagoda was a defendant at the Trial of the Twenty-One, the last of the major Soviet show trials of the 1930s. Following his confession at the trial, Yagoda was found guilty and shot. Description above from the Wikipedia article Genrikh Yagoda, licensed under CC-BY-SA, full list of contributors on Wikipedia.