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A Colorado guy who’d worked as a TV station ’s unlicensed security guard pleaded not guilty Friday in connection with a deadly shooting that occurred during a “Patriot Muster” protest last October.

Defendant Matthew Dolloff faces second-degree murder charges in the death of Lee Keltner, 49, a U.S. Navy veteran and participant at a pro-police “Patriot Muster” protest in Denver on Oct. 10.

Dolloff was employed as a security guard for Denver channel KUSA-TV when a confrontation broke out that led to Dolloff allegedly fatally shooting Keltner, authorities have said.

The security guard was later discovered to be lacking a Denver license for the job, FOX 31 of Denver reported.


Dolloff has been freed, awaiting further legal actions, since submitting a $500,000 bond on Nov. 3, according to the station.

A man strikes another man after a rally in Denver last October. The man at left was encouraging the “Patriot Muster” rally. He engaged with the guy on the right, hit him in the face and sprayed him with mace. The man at right then shot and killed the protester in the left. The man who was killed, identified as Lee Keltner, operated a hat-making business in the Denver area. (Getty Images)

The defendants attorney claims that body camera footage and “significant” data from Keltners cell phone, recently revealed by prosecutors, provide evidence that Dolloff was acting in self indulgent, FOX 31 reported. The defense plans to file motions in the case, the attorney said.

The defense has five days to file the motions, the report said, with a disposition hearing set for Aug. 2 and a motions hearing set for Aug. 6.

A bystander tried to de-escalate the argument and Keltner seemed to pull out a can of pepper spray or Mace, according to some   cellphone video taken by a KUSA-TV  producer.

At one stage, Kelter walks out of view of the movie and a man appearing to be him becoming angry at being filmed.  

Matthew Dolloff faces a murder charge in the death of Lee Keltner throughout a Denver rally last October. (Denver Police/Twitter)

“Get the cameras from here or I’m going to (expletive) you up, ” the unidentified man says.

The recording stops for 12 minutes.  

Authorities said Keltner  subsequently got into a scuffle with Dolloff before slapping him in the face and utilizing  the spray on him. Dolloff then allegedly shot him dead. The cellphone video picks up as police secured the scene following the shooting.


Denver’s medical examiner ruled Keltner’s death a homicide.  

KUSA-TV had hired Pinkerton to provide safety on the day of the demonstration, and Pinkerton subcontracted the project to Isborn Security Services LLC, FOX 31 reported. An official with the Denver Department of Excise and Licenses urged a six-month license suspension for Isborn for hiring Dolloff, according to the station.

Fox News’ Louis Casiano contributed to this story.

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