Is the US Already Using Brainscan-Based Lie Detection?

I have already writtten here about this technology as if it is a thing to come. But the ACLU suspects that the technology is already being used in interrogations abroad and has filed a FOIA (Freedom of Information Act) request to find out. Hasn’t the ACLU learned yet that the Bush administration, to protect us from the world terrorist conspiracy out there, also has to protect us from freedom of information?