I would love to talk/compare notes
there is an official report, in english, which lists the steps taken by the german authorities, after the discovery at katyn.
i know because i read it a week or two ago. but of course, i've lost the link.
you could also watch the film 'Katyn'. one doesn't need to speak Polish to know/see what took place.
not all of those found at katyn were reinterred there. this is regardless of what any report says to the contrary.