Thomas Winston, 32, of Saugatuck Avenue, surrendered Saturday night at Westport police headquarters on a warrant related to a May 4 drunk-driving incident when he was driving a scooter, police said.

A subsequent investigation showed that Winston was driving under the influence of drugs or alcohol, police said.

Winston was charged with operating under the influence of drugs or alcohol and a pair of motor vehicle violations. He was released on $2,500 bond. He is scheduled to appear July 3 in Norwalk Superior Court.