They were deprived of a timely trial by an impartial jury, for one thing. Is it not the duty of the Federal Government to defend the Constitutional rights of it's citizens?
The trial date will be within a year of the date of the alleged offense, which at least in my state, (Pennsylvania) is the official definition of a "speedy" trial.
It is even worse.
The prosecutor's job is not only to prosecute crimes,
the prosecutor has an AFFIRMATIVE DUTY to dismiss cases in which the evidece does not support the accusation.
Contrary to TV fiction they are not supposed to win at all costs. (or as in Nifong's cases use them as disposable pawns because they have the wrong skin color)