Müller was born in Sereď in the Czechoslovak Republic. In April 1942, he was sent on one of the earliest Holocaust transports to Auschwitz II where he was given prisoner number 29236. Müller was assigned to the Sonderkommando that worked on the construction of crematoria and the installation of the gas chambers. Once the crematoria were completed, Müller was assigned to a Sonderkommando unit tasked with operating the death facility; his performing this role, he believed, was the only reason the Germans kept him alive. Müller's unit would meet new arrivals of men, women, and children at the undressing area just outside the gas chambers, in the basement of the crematoria. He testified he would tell the terrified new arrivals that they were somewhere safe. Once the SS had given the command, the naked victims would be herded into the gas chambers, where they were gassed with the cyanic crystalline poison Zyklon B. After the victims had been killed, Müller's unit was tasked with the removal of the bodies and grouping them by size and fatty tissue to facilitate their disposal in the crematoria. The victims' clothes were collected and disinfected, and all valuables to be surrendered to the SS – some of which the Sonderkommando would pocket for bartering purposes.
Survival
Sonderkommando units were periodically murdered to eradicate witnesses but Müller managed to survive in Auschwitz for over two years. Eventually, Müller decided to end his life by joining a group of Czech arrivals destined for the gas chambers. While awaiting his fate, a girl came up to him, stating, Müller came to believe that he had a duty to stay alive so that he could join other survivors and become a living witness to the horrors of the Holocaust. He remained at Auschwitz until January 1945, when the camp was evacuated before the arrival of the Red Army. After a death march into Germany, he was liberated from the Mauthausen subcamp of Gunskirchen in May 1945.
Testimony
Müller first testified during his hospital recovery. His statement was originally published in an obscure Czech collection, but it was reprinted in the 1966 book The Death Factory, written by two other Holocaust survivors, Erich Kulka, and Ota Kraus. Müller testified at the second Frankfurt Auschwitz trials in 1964. He stated that, in the summer of 1942, he was transferred from the Sonderkommando of crematorium one, where he spent six weeks, to Monowitz. The Monowitz subcamp, from the main Auschwitz site, was a labor camp run by the German firm IG Farben, and there were no crematoria there. For the remainder of his imprisonment at Auschwitz, Müller worked mainly at Birkenau, where the main crematoria were located. After 1969, Müller lived in the West. He died on 9 November 2013, at the age of 91.
