The Usurper: And the only plausable reason for the secrecy which has surrounded our treatment & trials of detainees, so this point, is that we ourselves have something to hide.

That is hardly a true statement of fact.... there are other more plausible reasons.... because they are captured on a battlefield where they are not an active participant, not a member of any real army, and because they are captured in this manner, there is not any means to participate in any real or active investigation, and collect evidence, like in any real world situation. That is the one and only reason to "hide" anything