Police said officers went to the residence on Aug. 12 after a woman reported that Peters, her father, was violating an order of protection served the previous month. The order barred him from entering the home and possessing firearms or ammunition, according to the department’s account.

Responding officers recognized Peters, who was sitting in a car, from previous encounters and believed he might be experiencing a mental health crisis, police said. The department’s SWAT team was called in. Officers later found Peters barricaded inside the home, where police say he fired at them.

Negotiators urged Peters to surrender and put down his weapons. He called 911 and said he was heavily armed, but refused to give up the weapons, police said. The standoff involved an exchange of gunfire lasting several hours. After the shooting stopped, officers sent a drone into the home and confirmed Peters had died. No officers were injured.

The department said the shooting will be examined in two investigations: an internal administrative review and an independent criminal investigation. When both are complete, their reports will go to the Maricopa County Attorney’s Office for evaluation.

After that review, a Glendale “Response to Resistance Board,” made up of community members and subject-matter experts, will assess whether the use of force complied with department policy. Final findings will be sent through the department’s chain of command before they are made public. Police said the process could take several months or longer.

The briefing video carries a warning that it may contain disturbing content.