A sergeant with the DeKalb County police department was arrested Wednesday morning following an alleged assault against a teenager at a McDonald’s, according to police.

Scott A. Biumi, 48, of Cumming, was charged with aggravated assault for the April 9 incident at the McDonald’s on Old Atlanta Road, the Forsyth County Sheriff’s Office said.

Biumi was in the drive-through of the restaurant at 10:30 p.m. when he allegedly became upset with another customer, according to police.

“He exited his car, and following a verbal exchange with the customer, Biumi drew a gun and pointed it at the victim,” Deputy Courtney Spriggs with the Forsyth sheriff’s office said in an emailed statement.

Video footage from McDonald’s and released by the sheriff’s office shows a man, identified as Biumi, lunging into a pickup truck at the drive-through window. The alleged teenage victim, Ryan Mash, told Channel 2 Action News that Biumi got mad because it was taking too long to get his order.

“He grabbed me on my right shoulder and pinned me against my driver’s seat, and the next thing I know, I have a gun in my face,” Mash told Channel 2. “He goes, ‘Do you know who you’re messing with,’ and ‘You shouldn’t be holding up the line’ and all this and that.”

While investigating the incident, deputies determined Biumi was employed as a detective sergeant with DeKalb police, Spriggs said. At the time of the alleged incident, Biumi was driving a department-issued, unmarked Chevrolet and had a department gold star badge on his belt.

Biumi’s bond was set at $22,000 and he was in the process of bonding out of the Forsyth County jail Wednesday afternoon, Spriggs said. Biumi’s court date was set for May 23.

At an afternoon press conference, DeKalb County police Chief Cedric Alexander said he is awaiting the outcome of the Forsyth County investigation, but does not tolerate this type of behavior.