Bourgeois sources blithely claim that Soviet evidence in support of blaming the Germans for the atrocity was either totally absent or based purely on hearsay evidence of terrorised inhabitants of the region. They don’t mention one piece of evidence which even Goebbels had to admit was a bit of a bummer from his point of view. He wrote in his diary on 8 May 1943, "Unfortunately, German ammunition has been found in the graves at Katyn … It is essential that this incident remains a top secret. If it were to come to the knowledge of the enemy the whole Katyn affair would have to be dropped. "
Furthermore, documents were found on some of the bodies which had obviously been missed by the Germans when they doctored the evidence. These included a letter dated September 1940, a postcard dated 12 November 1940, a pawn ticket receipted 14 March 1941 and another receipted 25 March 1941. Receipts dated 6 April 1941, 5 May 1941, 15 May 1941 and an unmailed postcard in Polish dated 20 June 1941. Although all these dates pre-date Soviet withdrawal, they all postdate the time of the alleged murder of the prisoners by the Soviet authorities in the spring of 1940, the time given as the date of the supposed massacre by all those whom the Germans were able to bully into giving false testimony. If, as is claimed by bourgeois propagandists, these documents are forgeries, it would have been the easiest thing to forge documents which postdated the Soviet departure, but his was not done - and it was not done because the documents found were undoubtedly genuine.
“Katyn is the best documented “crime of Stalinism.” If they admit that the “official version” of Katyn is a lie, what else might turn out to be false? And then, what is the ideological justification for the dissolution of the USSR?” Professor Grover Furr asked.
During the analysis of the “Beria letter” (which consists of four pages) he magnified the text 3 times and carefully compared the images.
Molokov found that pages 1, 2 and 3 are written on a different typewriter than page 4. He has, among other things, examined the letters’ distance from each other, their altitudinal and the clarity of the printing ink. His conclusion is that the pages 1, 2 and 3 are consistently equal. But page 4 (the one with Beria’s signature on) differs from the first three pages.
It should be added that the typewriter which was used to print page 4 has a font that is known to have been on one of the typewriters in Beria’s office, while the font from the typewriter that wrote pages 1-3 is unknown (it has not been found in any of the documents sent by Beria).
https://www.idcommunism.com/2016/04/the-real-story-of-katyn-massacre.html