Nikolai Yezhov
In November 1938, Andreyev supervised the changes at the headquarters of the NKVD, in which Lavrentiy Beria was confirmed as its new head in place of Nikolai Yezhov, who was arrested and shot. Also in November, he chaired a session of the Central Committee of Komsomol, the communist youth league, at which most of its leaders were sacked, and later arrested and shot.