 Complete the following phrase:  Leonid Fedorovitch Raikhman 1908-1990 Леонид Федорович Райхман, also Reichman, alias Zaitsev, was a Soviet security officer, who rose to be a Lieutet General in the NKVD, NKGB and MGB. He prepared evidence related to the Katyn massacre for the Burdenko 