Massachusetts Rules of Criminal Procedure Ch. RCRP Rule 25

(1) Reservation of Decision on Motion. If a motion for a required finding of not guilty is made at the close of all the evidence, the judge may reserve decision on the motion, submit the case to the jury, and decide the motion before the jury returns a verdict, after the jury returns a verdict of guilty, or after the jury is discharged without having returned a verdict.

(2) Motion After Discharge of Jury. If the motion is denied and the case is submitted to the jury, the motion may be renewed within five days after the jury is discharged and may include in the alternative a motion for a new trial. If a verdict of guilty is returned, the judge may on motion set aside the verdict and order a new trial, or order the entry of a finding of not guilty, or order the entry of a finding of guilty of any offense included in the offense charged in the indictment or complaint.

(1) Right of Appeal Where Motion for Relief Under Subdivision (b) Is Allowed After a Jury Verdict of Guilty. The Commonwealth shall have the right to appeal to the appropriate appellate court a decision of a judge granting relief under the provisions of subdivisions (b)(1) and (2) of this rule on a motion for required finding of not guilty after the jury has returned a verdict of guilty or on an order for the entry of a finding of guilt of any offense included in the offense charged in the indictment or complaint.

(2) Costs Upon Appeal. If an appeal or application therefor is taken by the Commonwealth, the appellate court, upon the written motion of the defendant supported by affidavit, may determine and approve the payment to the defendant of his costs of appeal together with reasonable attorney's fees, if any, to be paid on the order of the trial court upon the entry of the rescript or the denial of the application.