A convicted felon allegedly "executed" two Virginia Beach, Virginia, police officers at point-blank range as they were already lying on the ground wounded and defenseless following a weekend traffic stop, authorities said.

Virginia Beach Police Officers Cameron Girvin, 25, and Christopher Reese, 30, were both pronounced dead early Saturday after being shot multiple times in a "horrific" encounter that was caught on the officers' body cameras and their squad car dashboard camera, according to Virginia Beach Police Chief Paul Neudigate.

"I can tell you from the video that after he executed our officers, he calmly walked away," Neudigate said of the suspect, identified as 42-year-old John McCoy III of Virginia Beach, who police said they found dead from an apparent suicide, ABC News reports.

Girvin and Reese were partnered up Friday night and were assigned to the midnight shift traffic car, Neudigate said. At about 11:27 p.m. on Friday, the officers attempted to stop a blue Hyundai Sonata after noticing it had expired license plate tags. The driver, according to Neudigate, failed to pull over.

The chief said the officers followed the car to a dead-end street, where the suspect pulled over and stopped.

At first the suspect refused to step out of the vehicle. When he did, he attacked the officers.

"This individual pulled a pistol from his pocket and immediately shot both VBPD officers," Neudigate said. "Those officers fell to the ground. While on the ground defenseless, he shot them each a second time."

“These officers were not just members of this department; they were family, friends, and heroes. Their sacrifice is a painful reminder of the daily dangers our officers face and their unwavering commitment to serve with honor and integrity,” Virginia Beach PD said on Facebook .