Influential District of Columbia businessman Jeffrey Thompson was charged Monday with conspiring to violate federal and local campaign finance laws by funding off-the-books campaign activity for candidates including Hillary Rodham Clinton and district Mayor Vincent Gray.

Thompson, the multimillionaire former owner of a well-connected accounting firm, was charged in a criminal information, a charging document that can only be filed with the defendant’s consent and typically signals a guilty plea. A court appearance was scheduled for Monday afternoon.