Disturbing new footage has emerged of a man being tasered by WA Police after being pulled over for a random breath test, with the state's corruption watchdog finding the actions of the officer involved were "unreasonable and oppressive".

The Corruption and Crime Commission (CCC) report found the officer involved acted unlawfully and committed serious misconduct in his actions, which culminated in the man — who was given an assumed name of "Bill Holt" — being confined in a cell for several hours after being tasered.

The tasering incident in Fremantle in March 2017 was captured on video by one of two passengers in the man's car.

Just hours after the report was tabled, police announced the officer was being stood aside while they reviewed the matters raised by the CCC.

The report said the incident began when Mr Holt was stopped for a breath test while he was on his way to dinner with friends.

He did not have alcohol in his system, but was issued an infringement sticker due to a broken windscreen and non-compliant accessories fitted to the car.

The report found the tasering officer, identified only as Senior Constable Keenan, believed there was a physical threat to police because of the way Mr Holt had moved his car while pulled over. He then attempted to remove the keys to the vehicle.

The CCC found a taser was wrongfully used against the driver.

Mr Holt then offered to remove the keys, the report found, but was tasered by Senior Constable Keenan just one second later — before he was taken to a police lockup, had his belongings removed and was held for several hours.

The video reveals how Mr Holt's wife, seated next to him, began screaming hysterically after he was tasered, while another officer angrily told the man filming the incident to stop.

Once Mr Holt exited the vehicle as directed, he was shoved by Senior Constable Keenan and then arrested while the officer continued to point his taser at him.

The CCC found the tasering action was "unlawful" as Senior Constable Keenan was unjustified in his belief that Mr Holt posed a threat to the officers.

"The outcome on this night was that an ordinary citizen, on his way to dinner with his wife and a friend, was tasered in his vehicle for no good reason, arrested and locked up," the CCC report stated.

Second constable removed name badge

The report was also scathing of another officer there at the time, identified only as Senior Constable Arnold, finding she attempted to bring an unjustified charge of obstructing police against the passenger who filmed the tasering.

An officer referred to as Senior Constable Arnold used her hat to block her face from being filmed. ( Supplied: CCC )

The report also suggested Senior Constable Arnold, who now faces charges "under police regulations", deliberately removed her name badge so as to not be identified in the video.

The video showed her repeatedly using her police hat to prevent her face from being seen, and telling Mr Robbins he was not allowed to film the incident.

The CCC found that numerous police investigations into the incident were "flawed", describing one internal probe that found the tasering was justified as an "inadequate response to a very serious allegation".

"The criminal investigation barely skimmed the surface of the issues and did not appropriately weigh the evidence available," the report said.

Driver 'glad' in wake of findings

The ABC tracked down the man referred to as Bill Holt, who declined to be interviewed but gave a brief comment.

"At the end of the day police deal with a lot of things in the line of duty. It's unfortunate how it's panned out," he said.

The man added he was "glad" the CCC had become involved after the officer who tasered him was initially cleared by police.

When asked if he would be pursuing compensation, he replied: "No comment".

Police said they welcomed the CCC report.

"As a matter of course, we will now review the initial WA Police investigation and outcomes to ensure the appropriate actions have been taken in light of the further investigation and analysis provided by the CCC," WA Police assistant commissioner for professional standards Nick Anticich said.

'Leg swipe' took down man in custody

The CCC also detailed another incident, in which a man suffered a serious knee injury while in police custody but was not offered any medical assistance.

Sorry, this video has expired Video shows police officer using 'leg swipe' on man in custody

An officer took the man down with a "right leg swipe" during an incident at a police station.

Video of the incident showed the man screaming in agony after he was thrown to the ground by the officer, before being led into a cell.

The man immediately complained that he had been injured, but was sent home without being given medical care and no record was ever established to register his time in custody.

The report stated that "a number of charges" were laid over the incident for breaching police regulations, with "most of those" sustained.

Taser incident could end in criminal charges

Attorney-General John Quigley confirmed the taser incident would be referred to the State Solicitor's Office to consider whether criminal charges should be laid against the officers involved.

Attorney-General John Quigley and Police Minister Michelle Roberts with the report. ( ABC News: James Carmody )

"It is terrible, it is absolutely confronting and shocking," Mr Quigley said.

"This is not going to be let [to] go through to the keeper."

Police Minister Michelle Roberts insisted there was no broader issue of use of excessive force by officers, but conceded the video would cause reputational damage.

"When people see that footage on the TV news, it will affect some people's view of police," she said.

"But people should reflect that these are, hopefully, isolated instances."

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