According to a report by Oakland television station, KTVU, the Office of the Inspector General of the U.S. Department of Labor and the U.S. Department of Transportation are joining the FBI in the investigation of the matter.
オークランド・テレビ局KTVUのレポートによると、、米国労働省と米国運輸省の監察官事務所が問題の調査でＦＢＩに加わっている。