Authorities in Pennsylvania say an officer was shot during what started as an ordinary traffic stop over a speeding violation.

According to the New York Post, two law enforcement officers were involved in the incident, which occurred last year.

New footage of the incident reveals what transpired just prior to a gunfight that left state trooper Seth Kelly serious injured from gunshot wounds to his neck and leg, as reported by CBS.

The traffic stop occurred in November 2017 when Kelly and trooper Ryan Seiple stopped 22-year-old Daniel Clary in Nazareth on suspicion of speeding.

When the motorist appeared impaired, police say a struggle between the troopers and Clary began.

Though the officers seemed to get the upper hand after deploying a stun gun, the man can be seen reaching into his vehicle and apparently retrieving a gun before opening fire.

In the exchange of fire, Kelly was seriously injured when his heart stopped. He was declared clinically dead and spent the next 12 days in a coma.

Suffering from a femoral artery, the trooper reportedly fashioned and applied his own tourniquet on the roadside after the suspect sped away.

Reports indicate police located Clary at an area hospital. He was arrested at that time and has since been convicted of attempted murder.

He is expected to be sentenced for the crime later this month.

As for Kelly, he continues to convalesce from the serious injuries he incurred last year but has plans to return to work with his partner in the near future.

Viewer discretion advised: Video contains graphic contents some viewers might find disturbing.

[Featured image: New York Post, video screenshot]