PC Andrew Harper murder trial: Dashcam footage shown in court Published duration 13 March

media caption PC Andrew Harper murder trial: Dashcam footage released

Dashcam footage of the moments before a police officer's feet were "whipped out from under him" and he was dragged away by a car has been shown to a jury.

PC Andrew Harper, 28, died from "catastrophic" injuries after he was dragged for about a mile on 15 August.

PC Andrew Shaw, who responded to a report of a stolen quad bike with PC Harper, said the moment his colleague fell was "the last I saw of him".

Henry Long, the car driver, and two 17-year-olds deny murder.

The Old Bailey heard PC Shaw, an advanced Thames Valley Police driver, had been an officer since 1990.

image caption PC Andrew Shaw told the court that his and PC Harper's shift was due to end hours before the incident

He and PC Harper entered a rural, single carriageway road where they "chanced upon" a Seat Toledo towing the quad bike.

PC Shaw said he could hear the car's engine being "revved loudly" and said he saw a "male figure" run past the driver's side of his car.

After PC Harper got out of the unmarked police car, PC Shaw said: "I looked through the window of my car and I could see [PC Harper] running in the road.

'Can't find him'

"As the car [the Seat] accelerated away PC Harper was standing then just appeared to fall straight back as if his feet had been whipped out from under him and that was pretty much the last I saw of him."

Prosecutor Brian Altman QC said PC Shaw was heard on the police radio saying: "I can't find my crew mate, I can't find my crew mate."

PC Shaw was heard saying his colleague had "got out the vehicle" and he had "now lost him".

Dashcam footage showed PC Shaw being flagged down by another officer who was attending to PC Harper in the road, after he had been detached from the vehicle.

image copyright Julia Quenzler image caption Henry Long (left) and two 17-year-old defendants - who cannot be identified due to their age - are in the dock at the Old Bailey

The court later heard from PC Christopher Bushnell, who was in another police car in pursuit of the Seat.

The court heard he stopped at a fork in the road, before the Seat then turned around and drove "absolutely straight at me". He had to "veer off the road to the left", he said.

The car had "no lights, it was a country road, it was almost second guessing where they were going", he added

Mr Long has previously admitted manslaughter and conspiracy to steal a quad bike.

On Monday, the two 17-year-olds, who cannot be named due to their age, pleaded guilty to conspiracy to steal a quad bike.

The pair also deny manslaughter.