Anne Sacoolas has been charged with causing death by dangerous driving by the Crown Prosecution Service.
Here are the key events following 19-year-old Harry Dunn’s death:
August 27: Motorcyclist Harry Dunn collides with a Volvo outside RAF Croughton in Northamptonshire.
Harry is taken to the John Radcliffe Infirmary in Oxford, but is pronounced dead shortly after arrival.
August 28: Northamptonshire Police interview 42-year-old suspect Anne Sacoolas, who is later granted diplomatic immunity.
September 15: Sacoolas leaves the country on a United States Air Force plane, but the Dunn family are not informed of her departure until three weeks later.
Northamptonshire Police are also not told that she has left the UK.
October 4: Harry’s parents, Charlotte Charles and Tim Dunn, call on US President Donald Trump to intervene and waive immunity for Sacoolas.
October 5: Foreign Secretary Dominic Raab urges US Ambassador Woody Johnson to waive immunity for Sacoolas.
October 6: Police write to the US Embassy in London to demand immunity is waived for Sacoolas.
October 7: Prime Minister Boris Johnson says the US should “reconsider its position” on the immunity given to Sacoolas.
October 9: Mrs Charles and Mr Dunn attend a meeting with the Foreign Secretary which leaves them “angry and frustrated” and feeling as though it was a “publicity stunt”.
Mr Johnson speaks to Mr Trump personally to ask him to reconsider the US’s position on the immunity granted to Sacoolas.
October 12: Sacoolas breaks her silence and issues a statement through her lawyer, saying the crash left her “devastated”.
October 13: The Foreign Office writes to Mr Dunn’s family saying Sacoolas does not have diplomatic immunity.
It becomes clear that her husband was an intelligence officer and not a registered diplomat in a recognised role, and therefore neither he nor his wife are entitled to diplomatic immunity.
October 14: Mr Dunn’s family hold a press conference in New York after taking their fight for justice to the US.
October 15: Mr Dunn’s family announce their intention to launch a judicial review into the advice given by the Foreign Office to Northamptonshire Police over the diplomatic immunity given to Sacoolas.
The White House calls an “urgent” meeting with Mr Dunn’s family and they have talks with President Trump.
Mrs Charles and Mr Dunn refuse to meet Sacoolas, who was in the room next door as they met Mr Trump.
October 20: The Dunn family are told Northamptonshire Police have passed a file to the Crown Prosecution Service (CPS) for a charging decision.
October 25: Radd Seiger, the spokesman for Harry’s family, confirms they would be taking legal action against the Foreign and Commonwealth Office and referring Northamptonshire Police to the Independent Office for Police Conduct over their roles in the investigation.
October 31: Northamptonshire Police confirm that they had interviewed the suspect in the case in the US and were passing the file of evidence over to the CPS.
Superintendent Sarah Johnson said: “We can confirm that we have completed an interview of the suspect in connection with the death of Harry Dunn, the details of which will be provided to the CPS for consideration alongside the rest of the evidential file already submitted.”
November 10: In a letter to Mr Dunn’s family, the FCO says the legal claim against them and Mr Raab was “without foundation”.
It also said it would “oppose and seek costs” for any judicial review.
November 12: Shadow foreign secretary Emily Thornberry criticises Mr Raab for “threatening financial hardship” on the Dunn family.
December 17: Mr Dunn’s family meet with Mr Raab again, and the Foreign Secretary then urged Ms Sacoolas to “come back to the UK and co-operate with the criminal justice process”.
December 20: The CPS charges Sacoolas with causing death by dangerous driving.