WA Police Minister Michelle Roberts has flagged a potential investigation after dashcam footage appearing to show a prisoner fall from an unsecured police paddywagon was published on Monday.
The dashcam footage, posted to the Dash Cam Owners Australia Facebook page, showed the man fall from the back of a police van as it turned on the corner of Newcastle Street and Charles Street in Leederville.
The post's caption from the anonymous driver said: "police forgot to lock the back door of there paddy wagon. Unfortunately the dashcam didn't captcha him running away and the police chasing him down the freeway [sic]."
The footage shows the door swing open as the van enters the intersection, and a man in a grey shirt fall face-first onto the road.
Officers continue to drive through the intersection, seemingly unaware of the incident.
It is unclear what date the footage was captured, but Ms Roberts described it as "very disturbing".
"Clearly there will need to be an investigation as to how that occurred ... [it's a] very serious matter," she said.
"It's obviously clearly important that prisoners are property secured and kept safe. I don't know whether there's any failure in the locking the van procedure or whether there's a mechanical fault or what the situation is at this point."
Ms Roberts said she would meet with WA Police Commissioner Chris Dawson on Monday to discuss a "range of issues" and expected she would receive an update then.