When a person enters a guilty plea, they normally do it because they know they're guilty, and don't want as severe charges during their sentencing.
A judge or jury must reach the decision that the defendant is guilty beyond a REASONABLE doubt. Not beyond ALL doubt - just "reasonable" doubt.
Guilty means that a person admits to committing the crime they were accused of. Not guilty means that a person denies committing the crime and the prosecution must prove their guilt beyond a reasonable doubt in court.
a person is allowed the opportunity to have a hearing
the doctrine of legal guilt
In court, you must either plead guilty or not guilty to the charges against you.
Presentation of evidence and testimony to prove guilt beyond a reasonable doubt.
you must study
A judge can order it, unless the person is already convicted, then it must the governor of the state.
Are you CERTAIN that he was found not guilty by judge and/or jury? If he was, and he's still on bail, then he must be charged with some other offense for which the court has yet to act.
A person accused of a crime must be offered a lawyer. If the person can't afford a lawyer, the courts will appoint one for free.
If you mean that you believe that the person in jail is not guilty of the crime for which they were sentenced; You must file an appeal of the trial and sentence. You will probably need the services of an attorney and it will have to be filed with your state's Court of Appeals
I do not think this is the right spelling. It should be ARRAIGNMENT --- that means to call him before the court to answer an accusation. In normal practice, arraignment is a hearing where a person accused of a crime must enter a plea of guilty, not guilty, or nolo contendre. If they enter a not guilty plea, the case will then be sent on for trial.