"The disturbing story of the Soviet massacre of thousands of Polish officers and intelligentsia at Katyn, Russia in 1940 and the subsequent cover-up and German investigation of the crime scene."
My friend and mentor, Guy T. Nunn, was a prisoner in Coldlitz. He was the ranking OSS guy there; most of the others were British. One day, he told me, a delegation of top SS men came to Coldlitz Camp and asked the Commandant to bring them the most important Allied prisoners. The Commanant brought in Guy Nunn and several other officers from the Alied nations. The head SS man gathered them together and said he had a proposition to the officers. The SS told them that they would free the Allied officers if they would come visit an excavation they were making in Poland and, usng their own eyes and evidence, take back to their home countries exactly what they saw. The SS was excavating the site of the Katyn Massacre and wanted the Allied oficers to witness that it wasn't the Germans who killed the Polish officers; it was the Soviets. Four of the officers agreed and went off with the SS. They were later freed and brought the evidence of Soviet brutality to their home countries. Guy didn't go - he suspected a trap, but his Second-in-Command, Martinez, went. That's how we all know it was the Soviets, not the Germans who massacred the Poles.