A DeKalb County Police Officer was arrested Wednesday in Forsyth County after he reportedly pointed a gun at a high school student in the drive-through line at a fast-food eatery.

The Forsyth County Sheriff’s Office has charged Scott Biumi, 48, with aggravated assault in connection with the April 9 incident at McDonald’s on Old Atlanta Road.

Biumi, who lives in Forsyth County, is a detective sergeant for the DeKalb County Police Department, authorities said.

According to the sheriff’s report, Biumi was upset about the length of time the order from the truck in front of him was taking while waiting in line about 10:30 p.m. for his order of two hamburgers and a small fries.

He reportedly drove his black Chevrolet Impala in front of the truck, got out and, after exchanging words, walked to the driver’s window of the truck.

He then pointed a handgun at the teenager's head and yelled “you don’t know who you are [dealing] with,” according to the report.

The man then withdrew his gun, got back in his Impala and drove away.

Forsyth County Sheriff Duane K. Piper called the incident “shocking.”

“It appears that he had a severe break in judgment,” Piper said. “It appears that the entire situation evolved from him being angry at the time it was taking for him to get his food.”

Factors early in the investigation led the agency to believe the suspect was a law enforcement officer, he said.

The man’s actions indicated that he had law enforcement training, Piper said. He also drove his police-issued Impala, which matched the tag number reported by the teens in the vehicle he confronted. The teens attend Lambert High.

A surveillance tape of the incident aided in the investigation, as did witness reports.

“Once we determined it was not going to be one of our officers, we expanded the scope of our investigation and eventually determined it was Mr. Biumi from the DeKalb County Police Department,” Piper said.

Biumi was booked into the Forsyth County Detention Center on Wednesday afternoon. His bond has been set at $22,000, with a court date scheduled for May 23.

It could not immediately be determined what, if any, action DeKalb police has taken in regards to Biumi’s employment.

“You wouldn’t expect any adult of any type to be acting like this,” Piper said, “but especially, with a law enforcement officer, I think they have even a higher standard of self-control, and to me, that’s the most shocking part.”