The Tempe Police Department on Friday posted camera footage of the body of the incident involving the teenager, identified as Antonio Arce by the mayor of the city.
The officer, identified by Tempe police as Joseph Jaen, was responding to a call from a citizen who reported a suspicious vehicle. In the alley, he approached a parked gray Chevy truck that was apparently involved in a robbery, Tempe police chief Sylvia Moir said at a news conference.
The video shows the officer hiding behind a trash can while the teenager gets out of the truck. The officer is heard asking the teenager to raise his hands while the child flees.
"He has a firearm," you hear Jaen say in the pictures.
The video shows that the teenager runs almost to the end of the alley, then the officer shoots two shots.
One shot hit the teenager in the shoulder blade and the other hit a wall at the end of the alley, Moir said. The authorities did not give a cause of death.
"The suspect turned to the officer, at which point the officer perceived a threat and fired his service weapon," the sergeant said. Ron Elbad said.
A police statement on Wednesday says: "During the case, the officer perceived a threat and fired his service weapon, striking the suspect." He adds that the agents performed CPR on the scene and "immediately called the paramedics."
However, the body camera video only shows the teen fleeing from the officer and does not seem to show his turn.
The gun the boy held was a replica of the 1911 airsoft gun that the teenager had just stolen from the truck, Moir said, adding that he had other stolen items.
"A question that must be asked"
"We are in the process of trying to find out what happened, the video is one piece," said Danny Ortega.
The distance between the officer and the boy when he was shot seems to be significant, Ortega said, noting that the family went to the police station and asked to see the images.
"It was a long distance," said the lawyer. "How this young man could have presented a threat from such a distant distance is a question that must be asked."
Jaén, a 14-year veteran of the Tempe police, has been placed on administrative leave awaiting criminal and administrative investigations. He was in the National Guard from 2007 to 2013, serving in Iraq in 2011, Moir said.
The police department is focused on being "open, honest and empathetic" and urges "everyone to suspend the trial until the criminal and administrative investigations are completed," Moir said.
The mayor of Tempe, Mark Mitchell, said he joins the family to mourn his son.
"All young people have the promise to lead meaningful lives and contribute to a greater good," said Mitchell. "When that potential is interrupted for any reason, it amounts to a tragedy that can not be overstated."
The mayor also expressed sympathy for the officers of the Tempe Police Department, which he says has focused on building community trust with more training. Mitchell said he hopes to continue developing "understanding, cooperation and trust," as well as reflective discourse and behavior while the research is being conducted.
"With the release of body camera images and the name of the officer this afternoon, there will be more scrutiny in this investigation," he said. "That scrutiny is understandable and justified. I would ask people to be patient as we learn the facts. "
CNN's Kelly McCleary and Chris Boyette contributed to this report.