Griotto was directly betrayed by Trepper, who gave his address to
Karl Giering of the
Sonderkommando Rote Kapelle. Giering had Trepper phone Griotto to arrange a meeting for the 21 December 1942, with Robinson at the
Palais de Chaillot in Paris, near his home, where he was to collect a message from Trepper. Both Griotto and Robinson were taken to
Rue des Saussaies. Griotto was interned at
Fresnes Prison. On the 11 March 1943, Griotto was tried at 62–64
Rue du Faubourg-Saint-Honoré in Paris by Luftwaffe Judge
Manfred Roeder and sentenced to death. 74 members of the Soviet espionage group were tried over several days by Roeder. Griotto and his wife Anna were deported to Germany on a convoy that left from Compiègne on 15 April 1943. Griotto was taken to
Plötzensee Prison where he was executed by guillotine on 22 July 1943. Anna was sent to
Ravensbruck concentration camp and survived. After the war she cared for children at a nursery run by the Fiat company. ==References==