A ninth member of the ring, known only as "Robert," was tracked down by the FBI through papers obtained from a janitor in a building that housed the German Consulate; the janitor was in charge of the burn-bag detail and regularly put papers in the furnace while the Germans watched. However, he would surreptitiously pull them out, douse the flames, and hand them over to the FBI. "Robert" was identified as Paul Borchardt (1886-1957), a World War I veteran who served in the German Army from 1913-1933. He later became an archeologist, but claimed that he was fired from his university post and confined in Dachau for being a Jew. Borchardt agreed to travel to the U.S. posing as a refugee and to spy for Germany due to patriotism.