 On 12 September 2008 the MPS announced that Dizaei was the subject of a complaint alleging that he had improperly provided advice to solicitors defending a woman accused over a fatal hit-and-run accident.Dizaei claimed that this was a malicious complaint brought about by Lord MacKenzie to further his business interests.MacKenzie was rebuked by Black Rod for using the House of Lords letterhead to make his complaint against Dizaei.