If a sheriff is a party to a suit or other proceeding, any writ, precept or process therein, required to be served or executed by a sheriff or deputy sheriff, shall be served or executed by the sheriff of an adjoining county, or his deputy.
Mass. Gen. Laws ch. 37, § 15
Service of writs against the sheriff or deputies
Official source: Massachusetts Legislature. Reproduced from public-domain Massachusetts statutes; confirm against the official source for the current text. Not legal advice.