Alfréd Wetzler

After the war, Wetzler worked as an editor (1945–1950), worked in Bratislava (1950–1955) and on a farm (1955–1970). After 1970 he stopped working owing to poor health. He died in Bratislava in 1988. He is buried in the Orthodox Jewish Cemetery.

Wetzler was born in Nagyszombat, Austria-Hungary (now Trnava, Slovakia). After his birthplace became part of Czechoslovakia, he was a worker in Trnava during the period 1936–1940. He was sent to the Birkenau (Auschwitz II) camp in 1942 and escaped from it with Rudolf Vrba on 10 April 1944. Together with Rudolf Vrba he wrote up the story of his experiences in Slovak as Auschwitz, Tomb of Four Million People, a factual account of the Wetzler–Vrba report and of other witnesses. The document combined the material from the Vrba–Wetzler report and two others, which were submitted together in evidence at the Nuremberg Trials as document no. 022-L, exhibit no. 294-USA. He later wrote a fictionalized account under the alias Jozef Lánik called What Dante Did Not See.

Wetzler is known for the report that he and his fellow escapee, Rudolf Vrba, compiled about the inner workings of the Auschwitz camp–a ground plan of the camp, construction details of the gas chambers, crematoria and, most convincingly, a label from a canister of Zyklon B. The 33-page Vrba–Wetzler report, as it became known, released in mid 1944, was the first detailed report about Auschwitz to reach the West that the Allies regarded as credible (in 1943, Polish officer Witold Pilecki wrote and forwarded his own report to the Polish government in exile and, through it, to the British and other Allied governments).

The deportations from Hungary halted after Hungarian-Romanian Jew George Mantello, then First Secretary of the El Salvador mission in Switzerland, publicized the report, which led to the saving of up to 120,000 Hungarian Jews. The publication of parts of the report in June 1944 is credited with helping to persuade the Hungarian regent, Miklós Horthy, to halt the deportation of that country's Jews to Auschwitz, which had been proceeding at a rate of 12,000 a day since May 1944.

Adolf Hitler instructed the Nazi representative to Hungary, Edmund Veesenmayer, to relay an angry message to Horthy. Horthy resisted Hitler's threats, and Budapest's 200,000–260,000 Jews were temporarily spared from deportation, until the pro-Nazi Arrow Cross Party seized power in Hungary in a coup on 15 October 1944. Henceforth, the deportations resumed, but by then, the diplomatic involvement of the Swedish, Swiss, Spanish, and Portuguese embassies in Budapest, as well as that of the papal nuncio, Angelo Rotta, saved tens of thousands until the arrival of the Red Army in Budapest in January 1945.

Alfréd Israel Wetzler (10 May 1918 – 8 February 1988), who wrote under the alias Jozef Lánik, was a Slovak Jewish writer. He is known for escaping from Auschwitz concentration camp and co-writing the Vrba-Wetzler Report, which helped halt the deportation of Jews from Hungary, saving up to 200,000 lives.