After a bunch of runaround, it seems like an independent investigation has to be appointed by the Attorney General.
If so, it’s never going to happen. Eric Holder was put in place specifically to prevent justice from ever happening, and he’s been very effective for that purpose. The only way the road will be cleared is if Eric Holder and enough of his underlings are impeached, that somebody with integrity is left at the helm pending new appointments.
Congress can appoint a special prosecutor by law. They do not have to wait for AG to do it.