"Investigator", an individual or group of individuals lawfully authorized by a department or agency of the federal government or any political subdivision thereof or a department or agency of the commonwealth or any political subdivision thereof to conduct or engage in an investigation of, prosecution for, or defense of a violation of the laws of the United States or of the commonwealth in the course of such individual's or group's official duties.
"Harass", to engage in an act directed at a specific person or group of persons that seriously alarms or annoys such person or group of persons and would cause a reasonable person or group of persons to suffer substantial emotional distress including, but not limited to, an act conducted by mail or by use of a telephonic or telecommunication device or electronic communication device including, but not limited to, a device that transfers signs, signals, writing, images, sounds, data or intelligence of any nature, transmitted in whole or in part by a wire, radio, electromagnetic, photoelectronic or photo-optical system including, but not limited to, electronic mail, internet communications, instant messages and facsimile communications.
Mass. Gen. Laws ch. 268, § 13B