"Once you have entered a guilty plea, the judge will convict you based on your own admissions, and you will ordinarily have no grounds to undo that conviction in a court of appeals. You may, however, be able to appeal your sentence, as long as you have not given up that right in any plea deal with the prosecution."
He did it because they were threatening to go after his son.
He is not guilty but saved his son from these dirty dogs.