My guess is that the FAA might not pursue this beyond a stern lecture...obviously she had a held a valid medical, and it's reasonable to assume that she did in fact have it in her possession at the time of the incident.
But the FAR's require you to produce your license (and I assume your medical) on request, so her failure to produce it for whatever reason is a technical violation. If the Fed is a real big jerk, he might go forward with it.
A nasa form will probably not help...people have been violated for not having charts and manuals updated, and that has been held to be intentional on the premise that you have plenty of time to get your gear organized before coming to work.
Get legal advice, and hope for the best. With an attorney's concurrence you might just go to the FSDO, hat in hand, and try to talk them into dropping the whole thing.