Mass. Gen. Laws ch. 277 § 4
Current with Act changes effective as of September 9, 2024
If there is a deficiency of grand jurors, writs of venire facias may be issued to the constables of such towns as the court orders to return forthwith the further number of grand jurors required. In Middlesex county, letters of venire shall be issued to the jury commissioner as set forth in chapter two hundred and thirty-four A.
Mass. Gen. Laws ch. 277, § 4