After the defeat of Germany in World War II, he was extradited back to the Soviet Union along with his father, Pyotr Krasnov.
On 11 September 1973, still serving his professorship, Krassnoff participated in the assault on the house of Chile's socialist president, Salvador Allende, which culminated in the 1973 Chilean coup d'état.
He later regretted that he was barred from becoming military attaché to the Soviet Union or securing a promotion to the rank of general because of his previous involvement in DINA.
[3] Krasnoff was one of the army officers involved in planning and administering Villa Grimaldi, the detention camp implicated in the torture of Chilean citizens under the Pinochet regime.
[8] He is referenced several times in the testimonies of Luz Arce, a prisoner and torture victim at Villa Grimaldi and later a collaborator with the regime.