A new book has claimed that Nazi leader Adolf Hitler did not kill himself in Berlin in 1945 but ended his days in Argentina. British journalist Gerrard Williams said he and co-author Simon Dunstan found an 'overwhelming amount of evidence' to suggest Hitler died an old man in South America. Many historians say the Nazi leader died in his Berlin bunker in 1945 - but Williams claims their research, looking at newly de-classified documents and forensic tests, challenges this. "We didn't want to re-write history, but the evidence we've discovered about the escape of Adolf Hitler is just too overwhelming to ignore," Williams told Sky news. "There is no forensic evidence for his, or Eva Braun's deaths, and the stories from the eyewitnesses to their continued survival in Argentina are compelling," he claimed. The book titled 'Grey Wolf: The Escape Of Adolf Hitler' claims the Fuhrer and his mistress Eva Braun were secretly flown out of Germany in April 1945 and taken to fascist-controlled Argentina. It is alleged Hitler lived in the country for 17 years, initially raising his two daughters, until his death in 1962. The book also accuses US intelligence of being complicit in the scam in return for access to Nazi war technology. " Stalin, Eisenhower and Hoover of the FBI all knew there was no proof of him dying in the bunker," Williams told the paper. He added that the book's new findings prove the 'Hitler' skull fragments held by the Russians are actually that of a young woman.