"Following swiftly on the smashing of a spy ring in this country, a Federal grand jury in Brooklyn, N.Y., last week leveled a unique indictment at the government of Nazi Germany: it baldly accused the Third Reich of conducting, in ten countries stretching from Peru to China, a worldwide espionage plot directed against the United States... The grand jury cited 65 overt acts in a 39-page document in which it alleged that the men and women now in custody had collected and transmitted to German agents secrets of a 'military, naval, commercial or industrial nature' since 1936."
J. Edgar Hoover tells how this ring was broken up in this 1951 article...
-from Amazon:
