On 25 November 1942, Trepper was arrested by Gestapo officer
Karl Giering and immediately offered to collaborate with the
Abwehr. On 2 December 1942, Hillel Katz was arrested. According to the report that was written by Gestapo officer
Heinz Pannwitz (sources vary), it was Trepper himself who betrayed Katz by phoning Katz up and arranging a meeting at the
Madeleine metro station in Paris, in what was a trap by the Gestapo. Trepper allegedly gave up the names and addresses of most of the members of his own network, the first people he betrayed were Katz and Grossvogel. However, according to Gestapo officer Hans Reiser, it was
Abraham Rajchmann, a member of the group, and an Abwehr informer, who told Reiser where Katz would likely be staying. Katz was moved to a house belonging to
Karl Bömelburg at 40 boulevard Victor Hugo,
Neuilly-sur-Seine at Trepper's insistence. Trepper informed Katz of his plan to escape from Neuilly, but Katz refused to follow as his wife and children were being held as hostages. On 13 September 1943, Trepper escaped Gestapo custody under watch while visiting a pharmacy. After Trepper escaped, Katz was taken to the Rue des Sausasaies in Paris and tortured to determine if he knew anything of the escape plan, but he never betrayed Trepper. After Trepper's escape, Katz disappeared. It is not known what happened to him but he was likely tried at a Luftwaffe court martial, presided over by Judge Advocate
Manfred Roeder and then either likely shot or deported to a concentration camp, as happened to many other people associated with the Red Orchestra in France. ==See also==