A teenager has admitted killing a Thames Valley police officer, PC Andrew Harper.
The 28-year-old newlywed died from multiple injuries after being dragged under a van when he was called to reports of a break-in last August.
The Thames Valley Police officer had been on duty when he was killed near the village of Sulhamstead in Berkshire, four weeks after he got married.
The alleged van driver, Henry Long, 18, from Mortimer in Reading, appeared at the Old Bailey for a plea hearing by video link from Belmarsh prison.
Long denied Harper’s murder but admitted conspiracy to steal a quad bike.
A 17-year-old co-defendant, who cannot be identified for legal reasons, entered not guilty pleas to PC Harper’s manslaughter and conspiracy to steal. Another 17-year-old boy denied the same charges at an earlier hearing.
A fourth defendant, Thomas King, 21, from Basingstoke, has admitted conspiracy to steal a quad bike.
The three teenagers are due to face a six-week trial at the Old Bailey from 9 March.