The Court, on motion of a defendant, may grant a new trial to him or her if required in the interest of justice. If trial was by the Court without a jury, the Court, on motion of a defendant for new trial, may vacate the judgment, if entered, take additional testimony, and direct the entry of a new judgment. A motion for a new trial based on the grounds of newly discovered evidence may be made only within one month after final judgment, but if an appeal is pending, the Court may grant the motion only on remand of the case. A motion for a new trial based on any other grounds shall be made within seven days after verdict or finding of guilty or within such further time as the Court may fix during the seven-day period.