Watch The Complete Chaos Backstage As The Shots Are Fired That Killed 1 Man & Injured 3, Including Troy Ave At T.I.'s NYC Concert. Police Commissioner Blames Gangster Rap

TMZ has obtained footage of the chaos backstage at Irving Plaza in New York City as shots are being fired during T.I.'s concert Wednesday, May 25.

People scramble for safety as the gunman, who cannot be seen in the video, slowly fires 5 shots from what ABC 7 reports was a 9 mm handgun.

As we previously reported, 4 people were hit with bullets during the shooting.

Troy Ave was shot in the leg, but is expected to recover. A 26-year old woman was also shot in the leg. She is in stable condition at Bellevue Hospital. A 34-year old man is in stable condition at Bellevue with a chest wound. The fourth victim, a 33-year old man, died at Beth Israel Hospital from a gunshot wound to the stomach.

Everyone backstage, including the gunman, had credentials to be there.

Police Commissioner Bill Bratton blamed the violence on "gangster rap."

"The crazy world of these so-called rap artists basically celebrates the violence," said Bratton Thursday morning on WCBS AM. "Unfortunately, that violence sometimes manifests itself in their performances and that's exactly what happened last evening. The backgrounds of some of these people, unfortunately the lifestyles they led or had, follows them into the entertainment world. No question a lot of talented artists, enjoy the music. Music all too often celebrates violence, degradation of women and the drug culture. It's unfortunate that some of them, as they get fame and fortune, cannot get out of the life."

According to ABC 7, Bratton added that NYPD detectives "have a pretty good idea of what happened" and should be able to "wrap this up very quickly."