"Official proceeding", a proceeding before a court or grand jury, or a proceeding before a state agency or commission, which proceeding is authorized by law and relates to an alleged violation of a criminal statute or the laws and regulations enforced by the state ethics commission, the state secretary, the office of the inspector general, or the office of campaign and political finance, or an alleged violation for which the attorney general may issue a civil investigative demand.
Mass. Gen. Laws ch. 268, § 13E