Mass. Gen. Laws ch. 21E, § 4A
(d) In any civil action in which a claim, third-party claim, counterclaim or cross-claim is filed pursuant to section four or this section, the court shall award contribution, reimbursement or the equitable share of liability for which one or more other parties is found to be responsible, if any. In addition, the court shall award the plaintiff its litigation costs and reasonable attorneys' fees if the plaintiff shows, and the court finds, that the person against whom the civil action is brought is liable and: