Switzerland Releases Classified Josef Mengele File Amid Outcry Over Censorship

Switzerland's intelligence service has released a classified 200-page file on Nazi war criminal Josef Mengele. Historians slammed the heavy redactions, warning the secrecy fuels conspiracy theories.

Israel HayomAuthor: Din Brandstatter
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Switzerland Releases Classified Josef Mengele File Amid Outcry Over Censorship
Photo: Israel Hayom / מסמכי "מלאך המוות מאושוויץ" נחשפים | צילום: אי.אף.פי

After years of anticipation, the Swiss Intelligence Service (NDB) has released the classified intelligence file on prominent Nazi war criminal Josef Mengele. Spanning over 200 pages, the file was published digitally on the agency's website to allow access for the public and researchers.

The newly revealed file contains a series of previously unknown findings and details: confidential police reports, newspaper clippings, public tips, financial transfer data from Paraguay, and testimonies regarding alleged sightings of Mengele in Ireland and Argentina. Central to the disclosed documents are details concerning the Nazi doctor's mysterious and possible visit to Kloten, Zurich, in 1961—information that was kept secret for decades.

Historians Outraged: "It Borders on Censorship"

However, what initially seemed like a major breakthrough for historians has turned into a focal point of sharp criticism due to extensive censorship. Many names and personal details within the documents were redacted, and details of the Kloten visit were withheld, save for the disclosure that Austrian intelligence had warned he might have been there. Historian Gérard Wettstein (65), who spearheaded the legal battle to expose the file, expressed deep disappointment with the authorities' conduct. "It borders on censorship!" he told the Blick newspaper.

He argued that withholding information about a major Nazi war criminal fuels conspiracy theories and damages Switzerland's reputation. Wettstein is now considering filing an appeal within 30 days to the Federal Administrative Court to gain access to the original, unredacted documents. The Swiss Department of Defense (VBS), for its part, explained that the redactions were made to protect sources and third parties, particularly given that the original document confidentiality was set until 2071.

Dismal Predictions Realized

The publication of the documents follows an announcement last May, when the intelligence service first declared its intention to open files that were supposed to remain locked for decades. That announcement came after a stubborn struggle by Wettstein, who even launched a crowdfunding campaign and raised 18,000 Swiss francs in a matter of days to fund the legal battle.

Already back then, researchers and historians expressed pessimism regarding the transparency of the documents to be released. Swiss historian Regula Bochsler, who researched Mengele's ties to the country, stated she did not trust the authorities and feared it would "look like the Epstein files." Ziga Zalla, president of the Swiss History Association, estimated at the time that the documents would likely contain references to foreign intelligence agencies—such as the "Моссад"—that operated to track down Nazi criminals, but doubted they would reveal dramatic new information on Mengele himself. It appears that now, with the release of the censored documents, the researchers' fears have indeed materialized.

The Swiss Connection and Evasion of Responsibility

Mengele, an SS officer, Auschwitz concentration camp physician, and one of the most notorious Nazi criminals, was responsible for selecting prisoners on the camp's ramp for the gas chambers. He is also infamous for the brutal medical experiments he conducted, primarily on twins, pregnant women, and children, most of whom were subsequently sent to their deaths.

Following World War II, he managed to evade justice using Red Cross travel documents issued at the Swiss consulate in Genoa. Despite trying to cover his tracks, his ties to Switzerland remained part of the mystery surrounding him. In 1956, he visited the country for a ski vacation with his son; in 1959, an international arrest warrant was issued against him while his wife rented an apartment in Zurich; and in 1961, as noted, Austrian intelligence warned he might be on Swiss soil. Despite the international manhunt, Mengele was never brought to trial. He died by drowning in Brazil in 1979 and was buried under a false name, with his remains identified only six years later.

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