Hillary Clinton has criticised how Donald Trump handled a meeting with the grieving parents of British teenager Harry Dunn, describing their White House summit as "quite clumsy".
The 2016 presidential candidate told Sky News the talks were "heavy handed", with Charlotte Charles and Tim Dunn having been left shocked to learn that the American woman involved in the crash that killed their son was in the room next door waiting to meet them as they spoke to Mr Trump.
Mrs Clinton said: "I want to express my condolences to the Dunn family. I cannot imagine the pain and suffering that they are feeling and I regret the incident at the White House, which seemed I think quite clumsy and heavy handed."
The October meeting came as Mr Dunn and Mrs Charles fought to see Anne Sacoolas returned to the UK to face police questioning over her role in the fatal road accident outside an RAF base in Northamptonshire in August.
Harry, 19, was riding his motorbike when he was killed in a collision involving Mrs Sacoolas, the wife of a US diplomat, who was granted diplomatic immunity after heading back to her home country.
Mrs Clinton refused to be drawn on whether Mrs Sacoolas should be brought back to the UK.
But she acknowledged the issue of diplomatic immunity "has caused confusion", adding: "There are grey errors and I hope that figureheads can figure out the appropriate response."
More from Harry Dunn
Mrs Sacoolas has been interviewed by Northamptonshire Police officers in the US, but her failure to return to the UK continues to frustrate the Dunn family.
Mrs Charles and Mr Dunn have said they are "absolutely on (their) knees" as a family almost 12 weeks since Harry died, with the Crown Prosecution Service (CPS) yet to decide whether to charge Mrs Sacoolas.
The 42-year-old is believed to have been driving on the wrong side of the road when she hit Harry on his motorbike outside the RAF Croughton base on 27 August.
In a letter sent to the couple and seen by Sky News, the CPS said it was "doing everything possible to reach a decision as soon as possible", but that it was "not possible at this time" to indicate when it might be forthcoming.
The note added: "We are treating our review of the circumstances of Harry's death as a priority, and are doing everything we can to make the decision on whether to prosecute as quickly as possible.
"While I cannot at this stage gave an indication of when that will be, we will of course update you when we can confirm timing, and make sure that you are told the decision before it is made public."