People often forget that soldiers are a different breed and it is too easy to bash them in the heat of the moment. Despite the rhetoric of people volunteering, the fact of the matter is that the majority of the troops there don't want to be in a sh!thole that is Iraq. Consider the fact the troops guarding the prison are mostly reservists (who probably left behind better lives in the continental United States) and combine that with the miseries that go with the job (bureaucratic mismanagement, lack of proper equipment, colleagues/friends under attack, chicken hawk politicians, etc.) PLUS the lack of direct oversight, and it is very easy for troops to just snap and lose that discipline. In fact, a little thing like delayed or lost mail is enough to make a trooper snap. We saw this with the Canadian Airborne Regiment in Somalia. And we have seen many instances of this in the world wars, Korea, Vietnam, etc.
All of that being said though, I still think that Lyddie England has zero excuses based on the precedents set. And even though a private has the legal right to arrest even a General/Admiral committing a war crime, how many believe, realistically, that a private will have the guts to actually do such a thing? Or, at a lower level, if a Lieutenant saved the life of a private one day, and then the next day this same private sees this Lt banging (raping?) some chic (even if it's against orders,) do you really think the private will rat the Lt out? IMHO, I think the private will just turn a blind eye and say tell the Lt later, "we're even."