Since the start of the war in Ukraine's eastern Donbas region in 2014, the Russian-installed regime there has been arbitrarily detaining civilians on a massive scale. Journalists, activists, local politicians: just about anyone the occupation authorities take a dislike to is in danger of being taken prisoner and tortured. Some are held for a few days, others for years. FRANCE 24's Gulliver Cragg investigates, with a consortium of media under the "Forbidden Stories" umbrella.