In the first days after the liberation of Auschwitz, the state law enforcement authorities intended to determine the scale of crimes committed in that concentration camp. The first to start, already in February, was the Soviet Extraordinary State Commission for the Investigation of the Crimes of the German-Fascist Aggressors. Witnesses in this investigation included Sonderkommando prisoners that escaped during the evacuation.
Former Sonderkommando prisoners, including Henryk Tauber, Shlomo Dragon and Henryk Mandelbaum, also gave evidence as witnesses in the trial of the former Auschwitz commandant Rudolf Höss.
For many years after the war Sonderkommando prisoners were engaged in commemorative and educational actions. They cooperated with the Auschwitz-Birkenau State Museum, where they submitted many testimonies contributing thus to knowledge of the way the gas chambers and crematoria functioned. They wrote memoirs and/or published extensive interviews. They also appeared in several documentary films.