Cook County Board of Review Commissioner Samantha Steele was arrested after a two-car crash on North Ashland Avenue on the city's North Side, Chicago police said.
Police said they found an open bottle of wine in Steele's car.
Steele was charged with a misdemeanor.
One of the officers at the scene testified that Steele refused to take a sobriety test.
Steel was found not guilty by a judge in a bench trial Tuesday on the grounds that the alcoholic beverage container was capped and bagged, and suspicion of impairment by the officers is not proof beyond a reasonable doubt.
In body camera video obtained by the I-Team, you see Steele's interaction with officers.
Additional video shows her being place in cuffs and into the back of a squad car.