He was arrested on April 5 , 1937 , during the Stalinist purges . On April 25 , 1938 he was indicted with " spying and provocative activities and membership in a right-wing counter-revolutionary organisation " , and was executed on the same day . Leon Lichtblau was posthumously rehabilitated by a decision of the Soviet Supreme Court on October 3 , 1956 , as well as by a commission of the Romanian Communist Party in 1968
Stalinist purges
Great Purge
Leon Lichtblau