I've searched this one. All I can find in the press is the statement by Hatfill that he passed it. And in one place, Kristof's "Mr. Z" piece in the NY Times, where he "hears" that Hatfill (presumably) was found to be "evasive".
My searches include CNN.
The CNN story is thus revealed to be a total lie. No one in Hatfill's present position should undertake ANY futher polygraphs. Even if he did, the results are supposed to be never given out, unless some investigator is trying to play mind games. Who is the source that has access to the inner workings of one of the highest visibility investigations? Visual media professor Dr. Barbara "Anthrax" Rosenberg? Flipping a coin gives better results than the polygraph because the polygraph passes sociopaths but incorrectly 'catches' extremely conscientious, rule-following types of personalities.