The Soviet code name of Rudolf Rössler, the leader of the Rote Drei, a spy ring active in Switzerland during World War II. Aformer German soldier who had lived in Lucerne since 1935, Rössler ran his own small publishing business while also working for Swiss intelligence. He was arrested by the Bundespolizei and prosecuted in October 1945 but, despite the abundance of evidence against him, he was acquitted, raising suspicions that he had been acting on behalf the Swiss military intelligence service, which may or not have been
aware of the scale of his contacts with the Soviets.