The Denver officer who shot a suspect in June will not face criminal charges, Denver District Attorney Beth McCann announced on Wednesday.

In a letter to the Denver Police Department, McCann said that Ofc. Andrew Niccum was justified in shooting the 17-year-old suspect — Steve Calderon — because he had fired upon Niccum first.

“It is clear to me that Officer Niccum justifiably feared for his life and acted in self-defense after Mr. Calderon fired his weapon at Officer Niccum. For that reason, I find his shooting of Mr. Calderon to be justified,” McCann said.

The incident occurred on June 7 in the 5100 block of E. Martin Luther King Jr. Blvd. around 7:30 p.m. Niccum and Officer John Wickiser responded to the area to investigate a Shot Spotter system alert, according to the press release by the Denver District Attorney’s Office.

Upon arrival, a witness described the shooter to the officers and claimed he had fled on-foot. Niccum got into a marked police vehicle and began searching the area.

The officer eventually found a man that matched the description riding a scooter with a woman. As Niccum approached and turned on his lights, the man — later identified as Calderon — stopped and let the woman off the scooter before fleeing. After a brief pursuit, Calderon dropped the scooter and began to run through yards, according to the release.

Both officers got out of the vehicle and gave chase. As Niccum got close, he noticed Calderon was holding what appeared to be a handgun, according to the bodycam footage. Niccum yelled for Calderon to drop the weapon. Calderon eventually stopped and aimed the gun at Niccum. Calderon allegedly fired multiple shots at the officer.

Investigators assert Calderon fired twice, hitting the gun magazine on the front of Niccum’s belt. The bullet penetrated the metal magazine, saving the officer from being hit.

Niccum fired eight shots at Calderon. One shot hit his thigh and the other went through his back, exiting the abdomen, according to the release.

Calderon was taken to a nearby hospital where he survived his injuries. He was later arrested on charges of attempted murder.

The Denver Police Department and Colorado Bureau of Investigations looked over the incident, per department policy. The District Attorney’s Office reviewed the evidence and found Niccum to be justified in his returning fire.

“Since Calderon’s intention was obviously to shoot Officer Niccum, I find that Officer Niccum reasonably believed that each of the shots he fired was necessary to defend himself,” McCann said in the letter.