WARNING WATCH: Feds Release Sickening Video Of Cop Tasering Innocent Teen, Leaving Him Brain Damaged The former officer now faces four years in prison for violating the teen’s constitutional rights.

06/07/2016 08:48 pm ET

Police dashcam video unsealed Monday by a federal judge in Missouri shows a deeply disturbing encounter between a former Missouri cop who, during a routine traffic stop, tasered, dragged and callously dropped a teenage driver face first onto the pavement. The officer’s actions during the arrest caused the teen to suffer brain damage.

Former Officer Timothy Runnels was sentenced last week to four years in prison over the September 2014 incident. The video above shows Runnels approaching a pulled-over vehicle being driven by Bryce Masters, then 17, who was on his way toplay video games with a friend.

“I haven’t done anything, officer,” Masters says as Runnels attempts to forcibly remove the teen from his car. Masters is heard refusing multiple orders to exit his vehicle.

Runnels tells Masters he’s under arrest, but doesn’t explain why. Eventually, Runnels says, “F**k it,” and discharges his stun gun on Masters, striking the teen near his heart.

As Masters slowly slumps out of the driver’s seat, Runnels grabs the teen’s cellphone — which he was using to record the incident — and flings it away. The teen then lies facedown on the ground, where Runnels eventually places him in handcuffs. According to court records, Runnels had his Taser deployed for about 20 seconds during the incident — the equivalent of four discharges of the nonlethal weapon.

Runnels then drags Masters’ limp body to the side of the road, where he drops Masters face first onto the ground. With his hands cuffed behind his back and unable to break his fall, Masters lands on the pavement with a horrifying thud.

Police originally said that Runnels stopped the car because he believed the license plate was linked to an outstanding arrest warrant. Masters’ parents argued that neither their son, nor their car, which was properly registered to the parents, had any warrants connected to them. Later Runnels said that he also smelled marijuana coming from the vehicle as part of his justification for placing Masters under arrest. He did find a small amount of pot on Masters when he searched his pockets. more