Libyan spy chief tracked to Qatar
23 October 2011 Last updated at 00:27 BST
The BBC's Panorama programme tracked Libya's former chief of spies, Moussa Koussa, to Qatar to confront him with allegations that he personally tortured political prisoners.
The programme interviewed torture victims who have called upon the west to acknowledge that Moussa Koussa, who fled Libya for Britain in March and had strong ties to the UK when Muammar Gaddafi was in power, should be brought to justice.
Paul Kenyon's report contains some disturbing images.
Panorama: Britain, Gaddafi and the Torture Trail, BBC One, Monday, 24 October at 2030BST and then available in the UK on the BBC iPlayer.