last year when he gave a sermon to his followers. but back when the u.s. had him under lock and key, he was seen as, believe it or not, a man who could be trusted. >> the americans seem to see abu bakr as someone who could keep the prison quiet. there are 24 camps within the sunni side of camp bucca, he was allowed open access to all of them. >> he wasn't considered from everything that we know now a high-level detainee, and he was allowed to, you know, lead prayers, he was allowed to give religious lessons. >> the future leader of isis was giving other inmates lessons on islam. those inmates were jihadists or former ba'athists, henchmen of saddam, or simply common criminals. >> it most assuredly was a jihadist university.