After obtaining a copy of his birth certificate through the West German embassy in 1956, Mengele was issued with an Argentine foreign residence permit under his real name. He used this document to obtain a West German passport, also using his real name, and embarked on a trip to Europe. He met up with his son Rolf (who was told Mengele was his "Uncle Fritz") and his widowed sister-in-law Martha, for a ski holiday in Switzerland; he also spent a week in his home town of Günzburg. When he returned to Argentina in September 1956, Mengele began living under his real name. Martha and her son Karl Heinz followed about a month later, and the three began living together. Josef and Martha were married in 1958 while on holiday in Uruguay, and they bought a house in Buenos Aires. Mengele's business interests now included part ownership of Fadro Farm, a pharmaceutical company. Along with several other doctors, Mengele was questioned in 1958 on suspicion of practicing medicine without a license when a teenage girl died after an abortion, but he was released without charge. Aware that the publicity would lead to his Nazi background and wartime activities being discovered, he took an extended business trip to Paraguay and was granted citizenship there in 1959 under the name "José Mengele". He returned to Buenos Aires several times to settle his business affairs and visit his family. Martha and Karl lived in a boarding house in the city until December 1960, when they returned to Germany.
When war erupted, Mengele was a medical officer with the SS, the elite squad of Hitler’s bodyguards who later emerged as a secret police force that waged campaigns of terror in the name of Nazism. In 1943, Mengele was called to a position that would earn him his well-deserved infamy. SS head Heinrich Himmler appointed Mengele the chief doctor of the Auschwitz death camps in Poland.
One of the clearest examples of Hitler’s single-minded (and seemingly suicidal) desire to rid the world of the Jews can be seen in the extermination of the Jews of Hungary. Until March of 1944, the Hungarian government had refused to allow the deportation of Hungarian Jews. It March 1944 the Germans occupied Hungary and by mid May ( two weeks before D Day) the mass deportations to Auschwitz. The Nazi leadership worked with particular intensity. The Soviet army was rapidly approaching Hungary and the Germans knew that they were going to lose the war. But there was no way that Hitler could allow such a large Jewish community to survive. He diverted trains that were badly needed to transport more soldiers to the Russian front just to send more Jews to Auschwitz. To him, the greater enemy was the Jew.
By the fall of 1948, Mengele had made up his mind to leave Germany and build a life elsewhere. Argentina was the preferred choice of sanctuary. There was a groundswell of Nazi sympathy in Argentina. And his father, Karl Sr., who owned a firm that manufactured agricultural equipment, thought that though his company had no branches in Argentina, he had made several business connections there that Josef might develop.
Jewish deportees in the Drancy transit camp near Paris, France, in 1942, on their last stop before the German concentration camps. Some 13,152 Jews (including 4,115 children) were rounded up by French police forces, taken from their homes to the "Vel d'Hiv", or winter cycling stadium in southwestern Paris, in July of 1942. They were later taken to a rail terminal at Drancy, northeast of the French capital, and then deported to the east. Only a handful ever returned. #
Historians disagree as to when and how the Nazi leadership decided that the European Jews should be exterminated. The controversy is commonly described as the functionalism versus intentionalism debate which began in the 1960s, and subsided thirty years later. In the 1990s, the attention of mainstream historians moved away from the question of top executive orders triggering the Holocaust, and focused on factors which were overlooked earlier, such as personal initiative and ingenuity of countless functionaries in charge of the killing fields. No written evidence of Hitler ordering the Final Solution has ever been found to serve as a "smoking gun", and therefore, this one particular question remains unanswered.
After the war, Mengele escaped internment and went underground, serving for four years as a farm stableman near Rosenheim in Bavaria. Then he reportedly escaped, via Genoa, Italy, to South America in 1949. He married (for a second time) under his own name in Uruguay in 1958 and, as “José Mengele,” received citizenship in Paraguay in 1959. In 1961 he apparently moved to Brazil, reportedly becoming friends with an old-time Nazi, Wolfgang Gerhard, and living in a succession of houses owned by a Hungarian couple. In 1985 a team of Brazilian, West German, and American forensic experts determined that Mengele had taken Gerhard’s identity, died in 1979 of a stroke while swimming, and was buried under Gerhard’s name. Dental records later confirmed the forensic conclusion.