Nikolai Yezhov
Poskrebyshev was not an ally of Nikolai Yezhov but some collaborative government business was to be expected due to the membership of Nikolai Yezhov in the Secretariat of the Central Committee. Probably he had garnered the animosity of Beria by spearheading corruption investigations in the Georgian apparatus of the NKVD—then controlled by Beria—in 1938.