The facts that you just presented could very well provide a defense to the charge of DUI. I can't say more without knowing more about what the police officer alleges that he/she observed. I would advise seeking legal advice from a local attorney before proceeding on your own in this matter,
I am an Arkansas lawyer. It may end up being beneficial to you that the state did not obtain a blood sample from you. The only negative is that you were probably also charged with a "Refusal"; however, in Arkansas, this is a simple license suspension that you are going to be serving out anyway because of the underlying DWI charge.
If you were not intoxicated (by alcohol, drugs, etc.), then you should look and sound okay if there is a dashcam video in your case. You need to hire an attorney and immediately get started on preserving this evidence.
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