Ohio Revised Code Title XXIX. Crimes Procedure § 2945.79

(A) Irregularity in the proceedings of the court, jury, prosecuting attorney, or the witnesses for the state, or for any order of the court, or abuse of discretion by which the defendant was prevented from having a fair trial;

(B) Misconduct of the jury, prosecuting attorney, or the witnesses for the state;

(C) Accident or surprise which ordinary prudence could not have guarded against;

(D) That the verdict is not sustained by sufficient evidence or is contrary to law; but if the evidence shows the defendant is not guilty of the degree of crime for which he was convicted, but guilty of a lesser degree thereof, or of a lesser crime included therein, the court may modify the verdict or finding accordingly, without granting or ordering a new trial, and pass sentence on such verdict or finding as modified, provided that this power extends to any court to which the cause may be taken on appeal;

(E) Error of law occurring at the trial;

(F) When new evidence is discovered material to the defendant, which he could not with reasonable diligence have discovered and produced at the trial. When a motion for a new trial is made upon the ground of newly discovered evidence, the defendant must produce at the hearing of said motion, in support thereof, the affidavits of the witnesses by whom such evidence is expected to be given, and if time is required by the defendant to procure such affidavits, the court may postpone the hearing of the motion for such length of time as under all the circumstances of the case is reasonable. The prosecuting attorney may produce affidavits or other evidence to impeach the affidavits of such witnesses.