Upon quick inspection, there appears to be no provision in the Federal or State (Ohio) Rules of Criminal Procedure for a Judge to set-aside a jury acquittal and enter a judgment of guilty. The Rules only appear to allow the judge to set-aside a guilty verdict, to wit:
FEDERAL RULES OF CRIMINAL PROCEDURE
As amended to December 1, 2003
Rule 29. Motion for a Judgment of Acquittal
(a) Before Submission to the Jury. After the government closes its evidence or after the close of all the evidence, the court on the defendant's motion must enter a judgment of acquittal of any offense for which the evidence is insufficient to sustain a conviction. The court may on its own consider whether the evidence is insufficient to sustain a conviction. If the court denies a motion for a judgment of acquittal at the close of the government's evidence, the defendant may offer evidence without having reserved the right to do so.
(b) Reserving Decision. The court may reserve decision on the motion, proceed with the trial (where the motion is made before the close of all the evidence), submit the case to the jury, and decide the motion either before the jury returns a verdict or after it returns a verdict of guilty or is discharged without having returned a verdict. If the court reserves decision, it must decide the motion on the basis of the evidence at the time the ruling was reserved.
(c) After Jury Verdict or Discharge.
(1) Time for a Motion. A defendant may move for a judgment of acquittal, or renew such a motion, within 7 days after a guilty verdict or after the court discharges the jury, whichever is later, or within any other time the court sets during the 7-day period.
(2) Ruling on the Motion. If the jury has returned a guilty verdict, the court may set aside the verdict and enter an acquittal. If the jury has failed to return a verdict, the court may enter a judgment of acquittal.
(3) No Prior Motion Required. A defendant is not required to move for a judgment of acquittal before the court submits the case to the jury as a prerequisite for making such a motion after jury discharge.
(d) Conditional Ruling on a Motion for a New Trial.
(1) Motion for a New Trial. If the court enters a judgment of acquittal after a guilty verdict, the court must also conditionally determine whether any motion for a new trial should be granted if the judgment of acquittal is later vacated or reversed. The court must specify the reasons for that determination.
(2) Finality. The court's order conditionally granting a motion for a new trial does not affect the finality of the judgment of acquittal.
(3) Appeal.
(A) Grant of a Motion for a New Trial. If the court conditionally grants a motion for a new trial and an appellate court later reverses the judgment of acquittal, the trial court must proceed with the new trial unless the appellate court orders otherwise.
(B) Denial of a Motion for a New Trial. If the court conditionally denies a motion for a new trial, an appellee may assert that the denial was erroneous. If the appellate court later reverses the judgment of acquittal, the trial court must proceed as the appellate court directs.
(As amended Feb. 28, 1966, eff. July 1, 1966; Nov. 10, 1986, eff. Dec. 10, 1986; Apr. 29, 1994, eff. Dec. 1, 1994; Apr. 29, 2002, eff. Dec. 1, 2002.)
Rule 31. Jury Verdict
(a) Return. The jury must return its verdict to a judge in open court. The verdict must be unanimous.
(b) Partial Verdicts, Mistrial, and Retrial.
(1) Multiple Defendants. If there are multiple defendants, the jury may return a verdict at any time during its deliberations as to any defendant about whom it has agreed.
(2) Multiple Counts. If the jury cannot agree on all counts as to any defendant, the jury may return a verdict on those counts on which it has agreed.
(3) Mistrial and Retrial. If the jury cannot agree on a verdict on one or more counts, the court may declare a mistrial on those counts. The government may retry any defendant on any count on which the jury could not agree.
The state rules read similarly.
Note a jury's acquittal seems to be the last word. However, under 29(d)(1), if the judge enters an acquittal after the jury returns a guilty verdict, this may be appealed and overturned, requiring possibly a new trial.
FEDERAL RULES OF CRIMINAL PROCEDURE
As amended to December 1, 2003
Rule 29. Motion for a Judgment of Acquittal
(a) Before Submission to the Jury. After the government closes its evidence or after the close of all the evidence, the court on the defendant's motion must enter a judgment of acquittal of any offense for which the evidence is insufficient to sustain a conviction. The court may on its own consider whether the evidence is insufficient to sustain a conviction. If the court denies a motion for a judgment of acquittal at the close of the government's evidence, the defendant may offer evidence without having reserved the right to do so.
(b) Reserving Decision. The court may reserve decision on the motion, proceed with the trial (where the motion is made before the close of all the evidence), submit the case to the jury, and decide the motion either before the jury returns a verdict or after it returns a verdict of guilty or is discharged without having returned a verdict. If the court reserves decision, it must decide the motion on the basis of the evidence at the time the ruling was reserved.
(c) After Jury Verdict or Discharge.
(1) Time for a Motion. A defendant may move for a judgment of acquittal, or renew such a motion, within 7 days after a guilty verdict or after the court discharges the jury, whichever is later, or within any other time the court sets during the 7-day period.
(2) Ruling on the Motion. If the jury has returned a guilty verdict, the court may set aside the verdict and enter an acquittal. If the jury has failed to return a verdict, the court may enter a judgment of acquittal.
(3) No Prior Motion Required. A defendant is not required to move for a judgment of acquittal before the court submits the case to the jury as a prerequisite for making such a motion after jury discharge.
(d) Conditional Ruling on a Motion for a New Trial.
(1) Motion for a New Trial. If the court enters a judgment of acquittal after a guilty verdict, the court must also conditionally determine whether any motion for a new trial should be granted if the judgment of acquittal is later vacated or reversed. The court must specify the reasons for that determination.
(2) Finality. The court's order conditionally granting a motion for a new trial does not affect the finality of the judgment of acquittal.
(3) Appeal.
(A) Grant of a Motion for a New Trial. If the court conditionally grants a motion for a new trial and an appellate court later reverses the judgment of acquittal, the trial court must proceed with the new trial unless the appellate court orders otherwise.
(B) Denial of a Motion for a New Trial. If the court conditionally denies a motion for a new trial, an appellee may assert that the denial was erroneous. If the appellate court later reverses the judgment of acquittal, the trial court must proceed as the appellate court directs.
(As amended Feb. 28, 1966, eff. July 1, 1966; Nov. 10, 1986, eff. Dec. 10, 1986; Apr. 29, 1994, eff. Dec. 1, 1994; Apr. 29, 2002, eff. Dec. 1, 2002.)
Rule 31. Jury Verdict
(a) Return. The jury must return its verdict to a judge in open court. The verdict must be unanimous.
(b) Partial Verdicts, Mistrial, and Retrial.
(1) Multiple Defendants. If there are multiple defendants, the jury may return a verdict at any time during its deliberations as to any defendant about whom it has agreed.
(2) Multiple Counts. If the jury cannot agree on all counts as to any defendant, the jury may return a verdict on those counts on which it has agreed.
(3) Mistrial and Retrial. If the jury cannot agree on a verdict on one or more counts, the court may declare a mistrial on those counts. The government may retry any defendant on any count on which the jury could not agree.
The state rules read similarly.
Note a jury's acquittal seems to be the last word. However, under 29(d)(1), if the judge enters an acquittal after the jury returns a guilty verdict, this may be appealed and overturned, requiring possibly a new trial.