This could get really ugly....
1. they've been imprisoned for 6 yrs with no charges filed in federal court....violates the right to a speedy trial.
2. they were "tortured" to get info.....human rights issue.
3. held without formal federal charges....I think there's a time limit of 72 hrs where something must be filed.
4. they will be able to plead the 5th....
5. past deeds will not be able to be mentioned unless the judge rules them admissable.
those were just ones I thought of off the top of my head....may not be totally correct, but I think a defense lawyer could use them....
edited by me to clarify the torture comment....