Dusko Popov vs. J. Edgar Hoover, 1941

From Family of Spies: A World War II Story of Nazi Espionage, Betrayal, and the Secret History Behind Pearl Harbor, by Christine Kuehn (Celadon Books, 2025), Kindle pp. 119-120: Special Agent Shivers was convinced the Kuehns were spies; he just didn’t know for whom. The payments pointed to the Japanese, but the FBI was getting information that the Nazis also had an interest in Pearl Harbor. That revelation came from another German spy turned double agent for the British Secret Intelligence Service, MI6: Dusko Popov. Popov was a well-educated Serbian who attended law school at the University of Freiburg in Germany in 1935. A few years later he was recruited by a former classmate to work for the Abwehr, the German military intelligence service. Popov immediately contacted the British diplomatic authorities, who enlisted him as a double agent. Within a short period of time, the Germans had come to trust him implicitly, even fronting him $50,000 to set up a spy ring in London. Popov was…