Pretty ironic, considering that it was almost certainly the FBI that illegally leaked Hatfill's name to the press. As far as the perps go, my personal opinion is that they probably fled a long time ago.
Of course, the possibility of leaks is an unfortunate reality in our government today, but this could be used as a justification for darn near just about anything that the executive branch is doing.
If members of Congress and/or their staffers do leak classified information in violation of their oaths of office, then in that case they can and should be prosecuted to the fullest possible extent of the law like anyone else.
But whet it comes to "Amerithrax", the Occam's Razor simple explanation for why they have completely clammed up is because they have nothing, and therefore they have nothing to say, and understandably don't want to admit it.
Note they indicted a fellow about 6 miles from the mailbox recently.
He had mirrored Al Qaeda’s website (kept it up)
The website had explained some of the code used in the letters in a FAQ.
So it’s not like they are sitting home quilting.