VANCOUVER — Dramatic new video showing an injured man crawling across a Vancouver street before he was shot by a police officer has set off a new investigation, five years after Paul Boyd was killed.

The officer was neither charged nor disciplined after the shooting in August 2007, mainly because there were too many conflicting witness accounts and a final investigation ruled Const. Lee Chipperfield was "inattentionally blind."

But 49 seconds of a shaky, dark video shot by a Winnipeg tourist may change that outcome and has forced the Vancouver Police Department and the B.C. government to ask the Alberta Serious Incident Response Team to investigate.

The BC Coroners Service also announced it will review its investigation more than a year after a coroners' jury made recommendations in how to prevent another such shooting by police.

"I still, after five years, don't understand what happened," said Danny Antonucci, an animator who worked with Boyd and considered him a friend.

"That video is heart-breaking. To see Paul crawling on his hands and knees. . ."

Antonnucci said his heart goes out to Boyd's family.

Boyd was shot after police responded to 911 calls and were confronted by a man swinging a bike chain. Chipperfield testified at the inquest that he believed Boyd was still armed when he fired the fatal shot to Boyd's head.

But the video, released to the media this week, appears to show Boyd was no longer holding the bike chain when he was killed.

Instead, it shows a police officer next to Boyd bending down and picking up the chain as Boyd — who was already injured by several police bullets — crawled across the street.

A vehicle blocked the camera's view of Boyd in the seconds before he is shot, but the officers confronting him are in full view and are seen backing away from the man.

The camera jerked to the sky as a shot is heard, someone next to the cameraman swore in German and the camera refocused on a lone officer standing in shooting position, arms outstretched with his gun held in both hands.

David Eby, executive director of B.C. Civil Liberties Association, said the video proves what his organization has been saying all along: Boyd wasn't a threat to police when he was killed.

"There is something about seeing a man crawling across the street to be shot in the head surrounded by police officers when he's fully disarmed, compared to just reading that on a piece of paper," Eby said in an interview.

Chipperfield was never charged, the B.C. Criminal Justice Branch concluded there wasn't enough evidence to establish that the officer's use of force was excessive.

The province's police watchdog later said there were too many conflicting accounts of what happened to conclude whether the officer used excessive force.

Eby said the video now indicates which eyewitnesses should be believed.

He also said the conclusion from the Office of the B.C. Police Complaints Commissioner that Chipperfield's intense emotional reaction to the altercation rendered him "inattentionally blind," can't be allowed to stand.