The Soviet Extraordinary State Commission (Chrezvychainaia gosudarstvennaia komissiia, ChGK) was founded on November 2, 1942. From the outset, photography and eyewitnesses were vital resources for conveying the horrors of the German occupation. Refuting accusations that the USSR was responsible for massacring Polish prisoners of war in Katyn forest further magnified the importance of generating an irrefutable record of Nazi guilt. This article examines the efforts of Stalin's government to bury the Katyn lie beneath images of genuine victims of Hitler's regime. Tracing the diverse origins of the ChGK's photographs and supporting testimony brings into focus the reasons why wartime observers found the Soviet falsification convincing. ChGK materials should be approached as artifacts of mass mobilization. By disentangling these pictures and pages from their propagandistic uses, researchers can move closer to understanding the symbiotic relationship between official narratives and personal truths in the USSR as well as the post-Soviet Russian Federation.