A serving officer has been arrested in connection with the death of a pedestrian who was involved in a collision with an unmarked police car.
The walker was killed in the incident in the village of Etwall, Derbyshire, just after midday on Tuesday, last week.
James Bane, 50, from Nottingham, was fatally hurt after a crash between a Peugeot 208 and two parked cars, a Mazda and a Volkswagen Up.
A 34-year-old female pedestrian was also injured in the collision.
Derbyshire police had previously confirmed that a 50-year-old man had been arrested on suspicion of causing death by dangerous driving and had subsequently been released on bail pending further enquiries.
The incident has been referred to the Independent Office for Police Conduct (IOPC), which is investigating the circumstances.
A spokesperson for the IOPC said: “An independent investigation is being carried out by the Independent Office for Police Conduct (IOPC) after we received a referral from Derbyshire police following a fatal road traffic collision.
“IOPC investigators are now looking into the circumstances around the collision which involved an unmarked police car on Egginton Road, Etwall, just after midday on Tuesday, September 28.
“A 50-year-old man sadly died and our thoughts are with his family. Our investigation is still at an early stage.”