In the video, Witherspoon can be seen arguing with police on the sidewalk.
"You're about to find out who I am," says the star.
Witherspoon commented on the incident, saying she was "deeply embarrassed" by what she said to the state trooper. She admitted she was drinking prior to the incident.
Witherspoon was charged with disorderly conduct during a traffic stop in Atlanta. Her husband, Hollywood agent Jim Toth, was arrested and accused of driving under the influence of alcohol during the stop.
The star pleaded no contest to physical obstruction of another. Her husband pled guilty.