Witold Pilecki Executed (1948)

On this day in 1948 (5708) Witold Pilecki was executed by the Communist Polish government after a show trial where he was found guilty of espionage. A leader of the Polish resistance, he volunteered to be imprisoned in Auschwitz, where he remained from 1940 to 1943. During that time, smuggled out information on the mass killings and other atrocities that the Germans were committing. They were the first comprehensive reports of the Nazi killing machine to reach the West.

https://en.wikipedia.org/wiki/Witold_Pilecki

Pilecki volunteered[2]: 66 [3][4][5] to allow himself to be captured by the occupying Germans in order to infiltrate the Auschwitz concentration camp.[6] At Auschwitz he organized a resistance movement that eventually included hundreds of inmates, and he secretly drew up reports detailing German atrocities at the camp, which were smuggled out to Home Army headquarters and shared with the Western Allies