You think the authorities tortured these people so bad that their only recourse is to wait for them to die / kill them all before closing to hide the evidence?
I wouldn't use the word "torture", as there is a big distinction between the work psychiatrists at Guantanamo did and physical torture, even if the two overlapped (e.g. drown the person and then revive them for some psychological objective). I can imagine how the physical techniques used in "enhanced interrogation" might actually not be the most morally abhorrent ones.
Thanks for linking that. Perhaps I should have been more clear.
While some of the things done to Guantanamo detainees qualify as "torture" under the UN definition (e.g. waterboarding), I can imagine a smart and determined psychiatrist working around that definition of torture and yet leaving a person in a psychological state which makes clear the immense immorality of their work.
In other words, there exists a set of "enhanced interrogations" that are not technically torture (in the way that waterboarding is), but that are still morally abhorrent and would likely be prohibited if revealed.