Mass. Gen. Laws ch. 119, § 34: Transportation of children in patrol wagons

Section 34. A child involved in any proceeding shall not be transported in a patrol wagon from his home or from any other place to any court or institution, but if a conveyance is necessary shall convey him in such other suitable vehicle as shall be provided or designated by the department. Violation of this section shall be punished by a fine of not less than twenty-five nor more than fifty dollars or by imprisonment for not more than three months.