Harry Dunn's parents say they need to learn more about their son's final hours while pursuing a civil claim in America
Watch an interview clip with Harry's parents here
The parents of Harry Dunn have returned to Northamptonshire after giving evidence in America in a damages claim against their son's alleged killer.
Harry, 19, was hit by a car being driven by Anne Sacoolas outside RAF Croughton in August 2019.
His parents, Tim Dunn and Charlotte Charles, made their depositions last week after flying out to Washington.
"I would literally go to the ends of the earth just to make sure we do get our justice for Harry," said Ms Charles.
They faced lawyers acting on behalf of Ms Sacoolas, who claimed diplomatic immunity after the crash.
The 43-year-old was charged with causing the teenager’s death by dangerous driving after her departure from the UK, but an extradition request was rejected by the US State Department in January last year.
Sacoolas, who will also be required to give legal testimony by July 23 as part of the civil claim, has the option to be present when Mrs Charles and Mr Dunn are deposed.
The depositions will form part of the “discovery” process in the Dunn family’s claim, in which correspondence and documentation relevant to the case will be handed over ahead of a trial at the end of the year.
The civil claim is one of a number of legal processes the Dunn family have entered into in order to secure justice for their son.
It comes after Foreign Secretary Dominic Raab said last month that while the US has blocked the extradition of Anne Sacoolas to face charges stemming from the collision, the path is now clear for the UK to push for a form of "virtual trial or process" to provide accountability and justice for Mr Dunn's family.
Mr Raab told BBC Radio 4's Today programme: "The US has not agreed to the extradition, but the path is clear for the legal authorities in the UK to approach Anne Sacoolas's lawyers - without any problem from the US government - to see whether some kind of virtual trial or process could allow some accountability and some solace and some justice for the Dunn family. I would like to see some accountability. I think the family deserve no less."
Read more about the Harry Dunn case here.