Purim
There is a tale in the Hasidic Chabad movement that supposedly Joseph Stalin died as a result of some metaphysical intervention of the seventh Chabad leader, Rabbi Menachem Mendel Schneerson, during the recitation of a discourse at a public Purim Farbrengen. Stalin was suddenly paralyzed on 1 March 1953, which corresponds to Purim 1953, and died 4 days later. Due to Stalin's death, nationwide pogroms against Jews throughout the Soviet Union were averted, as Stalin's infamous doctors' plot was halted.
Boris Shimeliovich
On November 22, 1955 (well after Joseph Stalin's death in 1953), military collegium of the Supreme Court of the Soviet Union withdrew the indictments against the JAC members due to the lack of evidence. Shimeliovich's Communist Party of the Soviet Union membership was restored only in 1988.