Updated

An Indiana man allegedly caught on video pointing a gun at a motorist and firing is facing a wanton endangerment charge in Kentucky, authorities say.

Dr. Perrin Dobyns pleaded not guilty Wednesday during an appearance in district court in Kentucky's Madison County.

Dobyns was arrested at his office at the Branchville Correctional Facility in Indiana on Monday, the day after the incident on Interstate 75, WKYT-TV in Lexington (http://bit.ly/18OFI15) reported. The station reports Dobyns was the prison's physician.

The incident was purportedly captured on video by David Kollar, who lives near Richmond.

Kollar was heading home on the interstate when he said he noticed a motorist driving erratically, adding he wanted to record the car's license plate. He said at one point when he pulled alongside the black sedan, the driver rolled down the passenger side window closest to Kollar.

"I expected to see a finger or something and instead I see a gun come up," Kollar told The Associated Press on Wednesday. "He's pointing it at me and he just has this cold look on his face."

Kollar said he heard a shot and hit his brakes.

He returned home, called police and sent them the video from his phone.

"I'm sick to my stomach and I have been since this happened," Kollar said.

Dobyns posted a $2,500 bond on Wednesday and was released from jail.

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Information from: WKYT-TV, http://www.wkyt.com