1: Belgium's Dungeo Duo - Serial Killers Marc Dutroux and Michele Martin

On August 13th, 1996, tucked behind a shelving unit lay a tiny, dingy dungeon where two young girls were hidden. The shock and horror of what would unfold in the days to come would only be matched by the accusations made by the primary suspect, who swore that he was acting on behalf of a child sex trafficking network that was organized and operated by the Belgian elite.