Leonid Fedorovitch Raikhman ( 1908-1990 ) ( Леонид Федорович Райхман , also Reichman , alias Zaitsev ) , was a Soviet security officer , who rose to be a Lieutenant General in the NKVD , NKGB and MGB . He prepared evidence related to the Katyn massacre for the Burdenko Commission in 1943 , and later , for the International Military Tribunal in the Nuremberg in 1946
Katyn massacre
Katyn massacre
Leonid Raikhman