Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 159, § 94

The person so arrested by railroad, railway or railway express police officers shall be taken to the police station or other place of lawful detention in the city or town where the arrest is made, or in the city or town where the car, vehicle, boat or vessel next stops, or in any city or town of the same or adjoining county through which the car or vehicle passes after the arrest; he may be placed in charge of a police officer or constable in either of such cities or towns, to be taken to a lawful place of detention within twenty-four hours after the time of such arrest, Sunday excepted. Complaint shall be made against the person arrested by the officer taking him to the place of detention, for the offence for which he was arrested, to a district court, and such court shall have jurisdiction of the case.