Unfortunately, nobody in this world has the combination of power, opportunity, and desire to take the CIA down for its crimes. They are the closest thing to a god that has ever existed; and organization that is profoundly beyond the grasp of society at large. They smite as they see fit, and there is nothing that can be done about it. Even if the American democratic system were functioning as designed/desired, the CIA would have ample opportunity to burn all of their records (as the Stasi unsuccessfully attempted). Black budgets (see:their involvement in the drugs trade) is one of their many insurance policies against accountability.