Disturbing body cam footage shows Sgt. Joseph Gibson trying to issue a ticket to Lich Vu for an improper driving maneuver related to a minor accident in October. As Vu protests, he appears to tap the officer on the chest lightly.

Gibson then violently body-slams the 71-year-old head-first into the pavement, causing significant injury, including an orbital fracture and brain bleed.

Vu remains hospitalized, according to a statement from the Oklahoma County DA’s office that goes on to say its investigation into the matter led to the conclusion the officer’s actions constitute an unreasonable use of force.

Behenna writes in the news release that she “takes all use-of-force incidents very seriously. We evaluate the law and the facts in each individual case, and in this particular case, determined the Officer’s actions were an unreasonable use-of-force.”

Gibson faces up to five years in prison if convicted on the charge.

Oklahoma City’s Fraternal Order of Police released a statement panning the charges.

“The OKC FOP stands behind Sgt. Gibson, who handled this call for service with professionalism,” a statement said. “It is very disappointing to see a police officer face felony charges for actions taken in good faith while serving in the line of duty. Sgt. Gibson followed his de-escalation training and protocol when assaulted.”