Leon G. Turrou

At the age of 18, he moved to the United States where he found a job working as a translator for The New York Times due to his polyglot skills.

During the trial itself, which took place in October 1938, his testimony was impeached by the defence using the accusations of seeking to make money and fame from the case, as well as allegations of witness tampering and even taking a bribe from Greibl.

The allegations did not stand, but the FBI thought Turrou had made the organization look amateurish and unable to defend the nation against espionage.

He settled in France and became a leader in the American veteran expatriate community, and also was employed by J. Paul Getty as his personal security chief until his retirement in 1955.

[7] The subjects of his investigation were Martin Schade, Captain William Drechsel, Karl Friedrich Wilhelm Herrmann, John Baptiste Unkel, Kate Moog and Dr. Ignatz Theodor Griebl.