Gurevich continued to act as a proxy to Ozols and the Mithridate network until the summer of 1944. Around the same time Gurevich moved from Neuilly-sur-Seine into Pannwitz's villa, located close to the Arc de Triomphe in Paris. As a result of his successes with Ozols, Sukolov made increasing demands on the Germans. One of these was to send Greta Barcza's son to a school in Paris and the Sonderkommando to pay the school fees.
