Mass. Gen. Laws ch. 140, § 159: Treble damages for injuries caused by dogs ordered to be restrained

Section 159. If a hearing authority or a district court has deemed a dog to be a dangerous dog and such dog wounds a person or worries, wounds or kills any livestock or fowl, the owner or keeper of the dog shall be liable in tort to the person injured by the dog for 3 times the amount of damages sustained by such person.