A police watchdog is to investigate Norfolk Constabulary's handling of the hit-and-run scandal involving two of its officers.

A woman was left shaken and furious after a marked police BMW X5 drove off without stopping after colliding into the back of her Audi A1.

Criminal charges against PC Karl Warren were dropped by the Crown Prosecution Service (CPS) after he claimed to have no recollection of causing the crash or failing to stop.

Eastern Daily Press: The crash involved a Norfolk and Suffolk roads and armed policing BMW X5The crash involved a Norfolk and Suffolk roads and armed policing BMW X5 (Image: Newsquest) 

The Independent Office for Police Conduct (IOPC) has now confirmed it is looking into the case after the 34-year-old woman raised concerns about how Norfolk police had handled her complaint. 

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In a letter, seen by this newspaper, the IOPC said it would be seeking more information from Norfolk Constabulary to determine whether to undertake a full review.

The independent complaints watchdog said it would look at the way police had handled her complaint, the outcome and the decisions reached.

“Our role is to look at the way the police handled your complaint, the outcome and the decisions reached,” it said. 

Eastern Daily Press: Dashcam showing the woman driver indicating and pulling off the road following the collisionDashcam showing the woman driver indicating and pulling off the road following the collision (Image: Norfolk Constabulary)

“This will involve looking at the reasons for submitting your application and the points you have raised in relation to the handling of your complaint.”

It said it could take up to 48 weeks to determine whether the outcome of her complaint had not been “reasonable and proportionate”.

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The woman, who asked not to be named, has also appealed against the decision by the CPS to drop criminal charges.

PC Warren had initially faced criminal charges of failing to stop or report an accident and driving without due care and attention.

The CPS said it had stopped the prosecution after receiving “very thorough” medical evidence the officer had suffered an episode of transient global amnesia (TGA), a sudden temporary episode of memory loss.

The victim said: “I simply couldn’t accept either the police’s investigation into the incident or the CPS’ incredible decision not to prosecute. 

“Appealing both was always my intention as I feel standards are not being met and I have been treated dreadfully. 

“I urge the CPS to think again and get the officer in front of a court.” 

A second officer, PC Ryan Hargrave, who was a passenger in the police vehicle, faces misconduct charges for not reporting the crash until the following day.