What work did Bela Katz do in the sonder-kommando?

Bela Katz was a Hungarian Jewish man who was a member of the Sonderkommando at Auschwitz-Birkenau. As a member of the Sonderkommando, he was forced to assist in the disposal of bodies of gas chamber victims and other tasks related to the extermination process. Katz's detailed written testimony provides valuable insights into the operations of the Sonderkommando and the horrors of the Holocaust.