In the event of a verdict of guilty, the defendant may enter his motion for a new trial, either orally or in writing, according to the statutes regulating the practice. In some states the motion must be supported by affidavit, setting out in detail all the reasons therefor.1 The motion for a new trial brings to the attention of the court all material errors counsel contends the court made during the progress of the trial; and also any new evidence that may have been discovered since the verdict. All matters of which error is complained must be presented on the motion for a new trial,2 except matters that can be reached by motion in arrest of judgment, otherwise they will not be considered by a court of review.3 There should be no delay in entering the motion for a new trial; it should be made at the first opportunity.4