If witnesses are in attendance in two or more criminal cases pending at the same time before the same court, they shall not be allowed full travel and attendance in each case, but the justice or clerk of the court may reduce and apportion the same, allowing at least one travel and attendance.
Mass. Gen. Laws ch. 262, § 59
Witness in multiple criminal cases; apportionment of fees
Official source: Massachusetts Legislature. Reproduced from public-domain Massachusetts statutes; confirm against the official source for the current text. Not legal advice.