Federal law requires certain officials to submit financial disclosures. And under 28 U.S.C. §13106(a) the Attorney General can bring a civil action if a covered official "knowingly and willfully fails" to file such a report.
Section (b) permits agencies, including the Judicial Conference, to make referrals to the Attorney general:
(b) Referral to Attorney General.-The head of each agency, each Secretary concerned, the Director of the Office of Government Ethics, each congressional ethics committee, or the Judicial Conference, as the case may be, shall refer to the Attorney General the name of any individual which such official or committee has reasonable cause to believe has willfully failed to file a report or has willfully falsified or willfully failed to file information required to be reported. Whenever the Judicial Conference refers a name to the Attorney General under this subsection, the Judicial Conference also shall notify the judicial council of the circuit in which the named individual serves of the referral.