[brnaftr361]

That makes sense in a vacuum, but if some of, or all of the principal actors of a given institution run a tight ship it's entirely probable that there are various unknown secrets to which only they are aprised. There's nothing that forbids some key officer from literally burying information in a completely undocumented spot. In such a case, if the buried treasure is of any value whatever, it becomes a point of leverage. Some artifact that could be lost to the world forevermore or discovered, hinging on some nefarious negotiation.

Not to mention the reality that aside from some sense of justice, allowing any of these people their freedom is probably irrelevant in the larger scheme of things. Which is to say that it's a gambit for valuable, empirical knowledge which for all intents and purposes, I would surmise, couldn't be elsewise obtained due to the moral standards of the West, or some theatrics which will have little consequence.