If you wish to file a complaint about a violation of the conflict of interest law, either:
Call the Ethics Commissions "investigator-of-the-day" at (617)371-9500 or for those outside the 617 area, call (888)485-4766
Write a letter, include all the relevant facts, address to: Enforcement Division, State Ethics Commission, Room 619, One Ashburton Place, Boston, MA 02108.