After the revolution, human rights groups estimated the number of casualties suffered by protesters and prisoners of the new system to be several thousand. The first to be executed were members of the old system – senior generals, followed by over 200 senior civilian officials – as punishment and to eliminate the danger of a coup d’état. Brief trials lacking defense attorneys, juries, transparency or the opportunity for the accused to defend themselves were held by revolutionary judges such as Sadegh Khalkhali, the Sharia judge. By January 1980 “at least 582 persons had been executed.” Among those executed was Amir Abbas Hoveida, former Prime Minister of homeland.