Watch: Body-camera video shows officer track, kill mass shooter at Allen, Texas, mall

Allen police on Wednesday released body-camera video from the officer who killed a mass shooter after the gunman opened fire on shoppers on May 6.

The officer was already at the mall on another call and stopped the gunman less than four minutes after the attack began, the video shows.

The shooter, Mauricio Garcia, killed eight people and wounded seven.

The video was edited by police to blur out the faces of civilians and victims, and some vulgar language has been removed, the Allen Police Department said in a news release. Police cautioned that some people may find the video disturbing and recommended discretion when viewing.

As is standard procedure, authorities presented evidence of the officer’s use of force to a Collin County grand jury. On Tuesday, grand jurors returned a “no bill,” confirming that the officer was justified in shooting Garcia. The officer has not been publicly identified.

“This video shows how quickly a routine interaction with the public turned into a life-and-death situation,” Allen Police Chief Brian Harvey said in the release. “The officer recognized the danger, ran toward the gunfire and neutralized the threat — and for his actions, the Allen community is forever grateful.”

The police department said it has requested a comprehensive and independent review of the shooting by the International Association of Chiefs of Police. “The resulting after-action report will offer insight and best practices to support future training and emergency response provided by Allen police,” the release said.