By Anica Padilla

DENVER (CBS4) —  The Denver Police Department has cited Pinkerton and Isborn Security for employing an unlicensed security guard — who shot a man at a protest downtown on Oct. 10. Matthew Dolloff is accused of killing Lee Keltner during a “Patriot Muster” demonstration and a “BLM-Antifa Soup Drive” counter-protest. The security companies had arranged for Dolloff to provide security for a 9News crew.

Matthew Dolloff (credit: Denver Police)

Dolloff has been charged with second degree murder. Dolloff’s lawyer has claimed self defense.

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Detectives assigned to the Denver Department of Excise and Licenses have cited Pinkerton and Isborn Security with a municipal code violation because Dolloff did not have the license required to work as a security guard in the city.

Video from bystanders, including the TV producer Dolloff was working with at the time, and photos from The Denver Post, show Keltner at first arguing with a Black man wearing a Black Guns Matter T-shirt before getting into an altercation with Dolloff. Cellphone video from the unnamed TV producer suggests Keltner was upset that the original argument was being recorded.

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The video shows Keltner, holding a spray can, walking out of view. A man’s voice — it’s unclear if it’s Keltner — is heard saying the area was no place for cameras. “Get the cameras out of here or I’m going to f— you up,” the unidentified man says. Keltner and Dolloff are then shown scuffling before the video stops.

(Photo by Helen H. Richardson/MediaNews Group/The Denver Post via Getty Images)

(Photo by Helen H. Richardson/MediaNews Group/The Denver Post via Getty Images)

Photos from the Post show Dolloff pointing his gun at Keltner as he fires what police said was pepper spray at Dolloff before Keltner falls to the ground.

When the TV producer resumes filming after the shooting, he tells arriving police that he is with the press and that the man who was shot “was going to get me.” He also says the security guard shot Keltner because Keltner used mace.

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(© Copyright 2020 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)

Anica Padilla