A Denton police officer accused of punching his ex-boyfriend in the face was arrested early Saturday, a Denton County Sheriff's Department spokesman said.
Todd Kidwell, 39, apparently got into an argument with the man in the parking lot of a restaurant in the 1000 block of U.S. Highway 380.
A passing motorist saw the men fighting and flagged down a deputy, the Dallas morning news reported.
The officer was taken to the Denton County jail and charged with assault. He was released at about 4 p.m. Saturday after posting a $2,500 bond.
The Denton County Sheriff's Department is investigating the incident as The Denton Police Department conducts its own internal investigation.
