If found innocent, the former defendant would go free within 4-6 hours.
When a person is charged with a crime, they will go to court, where a prosecutor will argue against them, while their defense attorney tries to prove the defendant's innocence.
If found guilty, the criminal would be moved to a prison to serve his/her time.
Both will present evidence and question witnesses to prove the innocence or guilt of the defendant.
After hearing all of the evidence and witnesses, the jury will vote guilty or not guilty. If found guilty, the judge will pass his/her ruling of punishment.
If found guilty, the defendant can appeal against the conviction. The judge can allow or deny the request.
The appeal has no jury, witnesses, or (usually) any from of evidence, and uses the evidence presented in the previous court trial. If found guilty again, the judge is able to lengthen or shorten the sentence.