Harry Dunn died in hospital after his motorbike was involved in a crash outside RAF Croughton, but the driver of the car that hit him was able to claim diplomatic immunity and return to the USA rather than face a court case in the United Kingdom. On 22 July the UK and the US agreed to amend an ‘anomaly’ that allowed the suspect, Anne Sacoolas, to claim diplomatic immunity because she was the wife of a diplomat. She was able to use a ‘secret agreement’ between the two countries even though she has been accused of killing by dangerous driving. Mr Dunn's mother said the change, which is not thought to be retrospective, was a ‘huge step in the right direction’.