That is what I told him. Just wondering if he can change his plea or appeal?
Drunk (intoxicated) in public is a generic public peace disturbance infraction.
Most courts assess a fine and place Defendant on probation for what is normally a misdemeanor.
Because it is not a Felony, none of his rights to vote/bear arms are removed.
HOWEVER.
Once you plead guilty, it’s kinda hard to change a plea to not-guilty, or appeal, without a basis in law or fact. Most Judges, in accepting the guilty / plea agreement, advise the Defendant of their rights to a jury / bench trial, where witnesses can be called, etc.
He’s stuck with the drunk in public thing. And no, there’s no requirement to have a person do a breathalyzer to arrest for intoxication under these circumstances. His plea of guilty just means he gave up his right to a trial and that of cross-examination.