Pc Andrew Harper's wife Lissie Harper says she is "deeply disappointed with the verdict" which she says has done little to give closure on the "heart wrenching pain" of her loss. Video / AP
Andrew Harper was making a routine response to a burglary when he died in horrific circumstances, just four weeks after he married his wife Lissie.
Prime Minister Boris Johnson said he was "deeply shocked and appalled" by Harper's death, and said his thoughts were with the officer's family, friends and colleagues.
"It is the most powerful reminder that police officers up and down the country put themselves at risk every single day to keep us safe," Mr Johnson said. "They have my absolute support."
Thames Valley Police Chief Constable John Campbell said that although the cause of Harper's death had not yet been confirmed, he had been "dragged along by a vehicle."
"He was out of his police vehicle at the time," he added.
In the past decade, 10 officers have been killed in incidents involving criminal suspects in England.
The most recent involved Police Constable Keith Palmer, who was stabbed in the 2017 attack on Westminster Bridge and parliament, which was deemed terrorism-related.