WARNING: The Video Posted Above Contains Explicit Language

A Dauphin County jury convicted suspended state trooper Ryan Luckenbaugh of simple assault and official oppression Friday for kicking an activist in the face as he was handcuffed in downtown Harrisburg in May of 2015.

A police dash cam caught the May 16 incident on video, which the Dauphin County district attorney's office presented as evidence in the case against the 37-year-old trooper.

The 20-minute dash cam video is posted above.

At about the 4:20 mark, it shows Luckenbaugh make a kicking motion toward a handcuffed Siennick on the ground and out of the camera's view. The trooper can be heard saying "Why don't you take that, huh? Spit on that."

A jury convicted Luckenbaugh after just 45 minutes of deliberation that followed a four-day trial. Senior Deputy District Attorney Stephen Zawisky said he'll likely seek jail time when Judge Scott A. Evans sentences Luckenbaugh, of Mechanicsburg, in April.

Pennsylvania state Trooper Ryan Luckenbaugh. Photo courtesy of abc27

An internal investigation was launched after Harrisburg police officers at the scene admitted to seeing Luckenbaugh kick Siennick in the face.

Luckenbaugh and his partner, Trooper Michael Trotta, had arrested Siennick in Harrisburg after he flipped them the middle finger as he rode his skateboard against traffic along North Second Street early in the morning.

Zawisky insisted that Luckenbaugh and his partner, Trooper Michael Trotta, had no just cause to arrest the 27-year-old.

Chris Siennick.

Luckenbaugh kicked Siennick as he sat handcuffed on a curb along Locust Street, after the troopers chased and Tased him and hit him with pepper spray.

The incident was filmed by the dash camera in Luckenbaugh's police cruiser, which also recorded Siennick angrily cursing the cops and calling them "Nazis," "storm troopers" and "pigs."

Zawisky said Luckenbaugh then had Siennick jailed for two weeks on trumped-up charges. Siennick was freed when the DA's office began investigating the incident.

Several Harrisburg police officers who witnessed the kick testified against Luckenbaugh at his trial. One called Luckenbaugh's action "appalling."

When asked about the outcome of the case, Siennick gave a one-word response:

"Cowabunga!"