Rhode Island General Laws Title 12. Criminal Procedure § 12-20-7. Witness fees

(1) For every day's attendance before the supreme or superior court, or before any other tribunal or magistrate, including attendance in giving depositions, except that no officer or other employee of the state or of any city or town shall be entitled to receive a fee for attendance if he or she attends during his or her regular hours of employment for which he or she is entitled to receive his or her ordinary salary or if he or she appears outside his or her regular hours of employment and is entitled to receive additional compensation from his or her employer for attendance: $10.00

(2) For every mile's travel: $0.10

(3) For every day's commitment in jail upon default to enter into recognizance with surety: $2.00

(4) For any witness who shall come from without the jurisdiction of the state to testify in behalf of the state, in any criminal proceedings, any sum, in addition to this travel and attendance, that the court before which the proceedings are had shall deem proper.