Judicial error is a thing. Declared mistrial over bad sentencing, procedural error, and etc. is a thing. It is not a harassing re-trial of the already convicted person, not the retrial of a person exonerated at court, a person found innocent by a judge and jury. Please, don't cite the Constitution in error.
The charges are declarable as in error - and they were arrived at through a plea bargaining, recall - whether through new evidence or a finding of misapplication, which is what this particular case demonstrates. He was found guilty of the incorrect charges. His sentence was what? Time served? For incestuous rape of his infant/toddler daughter? He is in fact retry-able. Judges have sentences overturned by higher courts all the time. And they get disbarred for them in cases like this. It's known as a miscarriage of justice.