He told /An Agent/, but I dont know that the FBI as a whole was made aware of the fact in any official way (even an ignored one like with Butters and the CPD).
Yeah, Tilly got clued in, but he can't very well report everything he knows up the chain without getting fitted for a straightjacket.
On the other hand, Harry and the gang dropped some bodies at the scene, and as I recall Murphy mentioned killing another set to guard the stairwell after they split up. If the Eebs missed removing any of their dead, inhuman bodies left behind after massacring a bunch of federal agents would be orders of magnitude harder to make go away than one videotape of a loup garou.
Only instead of Intpol, the Librarians. Favors exchanged between the council and the LoC could work this way.
Pretty sure the Librarians would be just about as averse to the White Council learning about their organization as just about any of the other supernatural nations. The WOJ about them was that they're obsessively secretive out of caution about the powers they're in opposition to. I wouldn't be surprised if they were behind a few of the assassination attempts against Harry that haven't been otherwise attributed (though Ace is also a candidate).