I think the follow up argument to make is that withholding evidence as a "State Secret" constitutes spoliation of evidence and should be considered in favor of

I think the follow up argument to make is that withholding evidence as a "State Secret" constitutes spoliation of evidence and should be considered in favor of the plaintiff. If it is that important to hide how the evidence was acquired then it must be more important than acquiring a conviction. Better 100 guilty men go free than 1 innocent man and such.