A party who calls the adverse party as a witness shall be allowed to cross-examine him. In case the adverse party is a corporation, an officer or agent thereof, so called as a witness, shall be deemed such an adverse party for the purposes of this section.
Mass. Gen. Laws ch. 233, § 22
Cross-examination of adverse party; corporation's agent as adverse party
Official source: Massachusetts Legislature. Reproduced from public-domain Massachusetts statutes; confirm against the official source for the current text. Not legal advice.