The man who was shot was part of a pro-police "Patriot Rally," according to a report."Further investigation has determined the suspect is a private security guard with no affiliation with Antifa," the Denver Police Department wrote in a Twitter message. KUSA-TV, a local Denver news station also known as 9NEWS, reported that a suspect in police custody was a private security guard hired by the station. A KUSA producer also was initially in custody, but has since been released."There was a verbal altercation that transpired. A firearm was discharged," Joe Montoya, Denver Police chief of investigations said. "An individual was shot and later pronounced deceased. There were two guns recovered at the scene.""The incident occurred after a man participating in what was billed a 'Patriot Rally' sprayed mace at another man. That man then shot the other individual with a handgun near the courtyard outside the Denver Art Museum," the newspaper reported. Police had a large presence at the protests to keep opposing protesters calm."There was a large presence because we had two groups with opposing views, and we know that can always get very tense," Montoya said. "There’s always potential for violence, we understand that. We had a large contingent there to try to watch the egress of one group, so that the other group wouldn’t intermingle with them, so that’s the reason for the large presence there."“We scheduled our action after learning that the militia-fascists had called a ‘patriot muster’ against the Black Lives Matter movement, anti-fascists and Marxists,” a representative for Denver Communists told Westword. “That’s us — guilty as charged and happy to oblige with our presence.”