Former Boston Celtics star Paul Pierce was arrested Tuesday night on suspicion of driving under the influence.

Police said they found Pierce asleep at the wheel on a Los Angeles highway when responding to an unrelated multi-car crash, per the Associated Press . They closed four of six lanes on U.S. Highway 101 and discovered Pierce sleeping in a stopped Range Rover SUV after they reopened the lanes approximately an hour later.

Officers “noticed signs of alcohol impairment” before conducting a DUI investigation. They arrested Pierce on a misdemeanor charge of driving under the influence of alcohol.

Pierce responded to the incident on Thursday night, posting a photo of the traffic jam and denying that he drove impaired.

“Imagine being stuck in stand still traffic for 45 mins and fall

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