The images show Lee Keltner arguing with another man, and witnesses believe the men will fight, the affidavit said.
Suspect in the shooting, 30-year-old Matthew Doloff and another man engaged in the confrontation, and Keltner was seen holding a box of pepper spray, according to the affidavit.
Keltner then turns his attention to Dolof and the other man, and the images show that Keltner and Dolof are “facing each other,”
“Mr. (Lee) Keltner punches Mr. (Dolof) in the side of the head with an open hand. Then Mr. (Dolof) is watched pulling a gun from his belt, aiming at Lee Keltner and firing once, hitting Mr. Keltner as Mr. Keltner dumps his (pepper) spray, “the affidavit said.
Keltner died at a hospital in Denver, according to a statement from the medical service.
According to police, Doloff was detained for a first-degree murder investigation. He appeared in court on Sunday and was held in prison without bonds, according to prison records.
In a statement released Sunday, Pinkerton said Dolloff was a third-party contractor.
Dolloff is not licensed to be a security guard in Denver, according to Eric Escudero, a spokesman for the city’s Department of Excise and Licenses.
If Doloff works without a license, he could be fined up to $ 999 or face up to a year in prison, Escudero said. The company that hired Dolloff could also face administrative claims, if that is the case, according to Escudero.
Richards told the Post Office that Doloff was defending himself.
“Matt did everything he had to do and everything he was trained to do,” Richards told the Post Office. “Even if he didn’t have a special security license in Denver, that didn’t stop Pinkerton from sending Matt to this job, and that doesn’t change the fact that Matt was acting in self-defense.”
CNN contacted Richards on Tuesday, but did not receive an immediate response.
Pinkerton said he was cooperating in the investigation.
KUSA issued a statement Tuesday saying it did not know Dolloff was armed.
CNN’s Dave Alsup, Claudia Dominguez, Kay Jones, Lucy Kavanov, Raja Razek, Holly Silverman, Alta Spells and Amir Vera contributed to this report.