My instructors told me [us, the class] when I was studying law that a not guilty verdict could not be appealed, they also told us that a jury’s guilty verdict could be over ruled by a Judge and a direct verdict of not guilty rendered. However that said that a judge could not over ride a not verdict and direct a verdict of guilty. In other words, once the jury rendered a not guilty verdict; it was over. But that was then and this is now.
That’s my understanding as well. Overruling a jury acquittal in the absence of misconduct directly involving the jury sure seems like double jeopardy to me.