An American woman charged with causing the death of Harry Dunn on a road near RAF Croughton had a background in the CIA, Sky News has confirmed.
But Anne Sacoolas was understood to have been at the Northamptonshire air base as a spouse only and had no official role while she was in the UK.
The Mail on Sunday reported that Sacoolas was a former CIA spy.
Shortly after 19-year-old motorcyclist Mr Dunn died in a head-on crash with a car on 27 August, the suspected driver, Sacoolas, claimed diplomatic immunity and left the UK for the US.
Her husband is thought to be a US intelligence officer.
In December, the Crown Prosecution Service charged her with causing Mr Dunn’s death by dangerous driving.
But US Secretary of State Mike Pompeo has refused to allow a UK request for Sacoolas, 42, to be extradited to Britain.
Prime Minister Boris Johnson joined Foreign Secretary Dominic Raab and Home Secretary Priti Patel in criticising Washington’s decision to reject the request for the American to return to the UK.
And on Sky’s Sophy Ridge on Sunday, former foreign secretary Jeremy Hunt said Sacoolas’ CIA background may have a bearing on why the US was not allowing the extradition.
He said it was “totally unacceptable that she is not facing justice in the UK” and added the US was not treating the UK as an ally in the case.
Sky’s Lisa Dowd said of the CIA background revelation: “What it does do perhaps for the family is to explain what they see is the steadfast support from the United States administration for Anne Sacoolas in all of this.
“What the family are very interested to know is what the British government knew about Anne Sacoolas’ background because when the family first approached Sky News with their story back in October they felt that they had very little help from the British authorities.
“And they felt that her background may explain something about that. Of course, that is something that the government would dispute.”