This does not make him a rat. It does make the FBI sound like total jerks. What in the world can he have on have on Hoffa's killing? He is just trying to get himself notified, as usual. If he knew about Hoffa he would have given it to the FBI years ago, or written about it in his book. In fact, if he is really meeting with the FBI over this, they can arrest him for withholding the information all this time.