At the beginning of December, 1948, a German national arrived in Washington, D.C. to take up an important position with the newly-formed CIA. He was a specialist on almost every aspect of Soviet intelligence and had actively fought them, both in his native Bavaria where he was head of the political police in Munich and later in Berlin as head of Amt IV of the State Security Office, also known as the Gestapo.
His name was Heinrich Müller.