Thanks for the input; I actually understood that part. The mystery for me continues to be the consequences of the legal concept: mistrial...
In a mistrial it is as if the trial had never happened. The case can be retried before another jury. There may be a problem here since the verdict was announced. The question is that since jeopardy had attached and the verdict of acquittal was announced, would a retrial constitute double jeopardy?
Whether the judge has to accept or approve the verdict may be a question also.