Declassified FBI documents contain a number of alleged sightings of Hitler along with theories of his escape from Germany. The FBI states that the information within those documents pertaining to the escape and sightings of Hitler cannot be verified.[6]

A skull fragment with a bullet hole, found outside Hitler’s bunker and kept in Russia’s federal archives in Moscow, was for decades believed to be that of Hitler. In 2009, samples of the skull were DNA-tested at the University of Connecticut by archaeologist and bone specialist Nick Bellantoni, et al. The sample was found to be that of a woman aged under 40.[7]

However, neither former Soviet nor Russian officials have claimed the skull was the main piece of evidence, instead citing jawbone fragments and two dental bridges which were found. The items were shown to Hitler's dentist, Hugo Blaschke; dental assistant Käthe Heusermann; and longtime dental technician Fritz Echtmann, who confirmed the dental remains found were Hitler's and Braun's.[8][9] The skull fragment was found only later, in 1946, when the Soviets investigated rumours of Hitler’s survival.