Alex Moumbaris started working for the African National Congress (ANC) in Paris immediately after his release. He established the first office at 42 Rue Rochechouart, for which the French Communist Party paid the rent and other bills. During Dulcie September's tenure the office was moved around 1985 to 28 Rue des Petites-Écuries "for security reasons", where she was assassinated in 1988. The expenses for the second office were paid indirectly by the Socialist Party, through the Centre for Research Information Action in Africa (CRIAA) and more precisely Jean-Bernard Curial (information provided by Alex Moumbaris).
Alex and Marie-Jose (Smoothy) Moumbaris were arrested on the 19 July 1972 while trying to cross the border from Botswana. They were secretly detained for 4 months, before being charged, and their relatives were unable to establish their whereabouts. Helen Amiel, Alex Moumbaris mother, traced their whereabouts from their departure in Paris on the 8 June 1972, having received the last news from Gaborone in July 1972. The matter only appeared before the Pretoria Magistrate's Court on the 20 November 1972, when Alex Moumbaris and 5 Others were charged under the Terrorism Act. Marie-Jose, who was pregnant at the time, had been released and deported in September 1972.
