The twin brother of Harry Dunn says it was "like a punch in the face" when the American woman accused over his death claimed diplomatic immunity and returned to the US.
Speaking to Sky News after the 19-year old's death on 27 August, Niall Dunn said: "When we were told, it was like a punch in the face really – telling you tough, you know, she's not coming back, end of story, go and cry at home.
"That's really what it did feel like."
Harry Dunn died in a collision with American driver Anne Sacoolas, who is believed to have been driving on the wrong side of the road after leaving RAF Croughton, a US spy base, in Northamptonshire.
Mrs Sacoolas claimed diplomatic immunity because of her husband's job at the site, then left the country.
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Harry's family have never accepted that she was entitled to immunity and have begun a legal fight against the Foreign Office, who maintain that she was entitled to it.
"I want the truth down to every single second to what's happened, who has made the decisions, who made the decision, who allowed her to do this, whether it was one person at the top or 100 people down the whole line who decided this was OK," said Mr Dunn.
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Since the crash eight weeks ago, Mr Dunn has been house-bound with grief, but seeing his parents launch an international campaign for justice has helped him find the strength to speak out.
He said he had watched from home what "seemed like another stunt from Donald Trump" as his parents, Charlotte Charles and Tim Dunn, were invited to the White House – only to find out that Mrs Sacoolas was in a nearby room ready to meet them if they wanted to.
They declined, having made it clear they would only do that if she agreed to return to the UK.
"I know it was very wrong", said Mr Dunn. "A deluded way to go about helping us if that's what they were trying to do.
"It doesn't take a genius to figure out just how damaging that was to put them in a situation like that.
"Then the fact I wasn't there – it destroyed me, being a million miles away."
The US says Anne Sacoolas will not return to the UK so the family will pursue a civil claim for damages against her.
"I see my mum, she deserves justice. I see my dad, he deserves Read More – Source
