I'm Lucy, and I'd be happy to answer your questions today. I'm sorry to hear that this happened.
If you pleaded not guilty, they have to give you a trial. At trial, they'll have to prove beyond a reasonable doubt that you were intoxicated when the officer stopped you. Without a breathalyzer or failed field sobriety tests, they're already coming up short on proof. The officer will testify as to what he saw and why he felt you were drunk. If he doesn't show up, ask them to dismiss the case, and you'll fine. If he is there, you can ask him questions about why he stopped you and try to prove that he didn't really have any reason to think you were drinking.
Then, you have the option to take the stand yourself. You can testify to the one beer you had hours earlier and explain or dispute anything the officer said when he testified. If you had friends at the game with you, they can take the stand to testify as to whether you were drinking at the game or if you appeared drunk when you left. With any luck, you'll be found not guilty.
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