The matter was never resolved as both the FBI and a congressional subcommittee reporting in May 1984 failed to determine how or through whom the briefing book came to the Reagan campaign. The Justice Department, in closing its investigation, cited "the professed lack of memory or knowledge on the part of those in possession of the documents". Still, it said the contradictions between Reagan aides like Baker and Casey "could be explained by differences in recollection or interpretation". In a case brought by John F. Banzhaf III, an order by a federal judge that the Justice Department appoint a special prosecutor was overturned on appeal in July 1984.