London (CNN) The parents of a British teenager who died when his motorcycle collided with a car are coming to the United States to press their argument that the other driver -- identified by police as an American diplomat's wife -- be returned to the United Kingdom.

Harry Dunn, 19, died in a crash August 27 in Croughton, Northamptonshire, home to a Royal Air Force station controlled by the US Air Force. UK police say the other driver was traveling on the wrong side of the road when their car collided with Dunn.

Dunn family spokesman Radd Seiger tweeted Friday that he was on his way to Washington, DC, and New York to "take our campaign for #JusticeForHarry to the United States."

On my way to Washington DC and New York to take our campaign for #JusticeForHarry to the United States. See you soon America! #HarryDunn @Justice4Harry — Radd Seiger (@RaddSeiger) October 11, 2019

Seiger told CNN the teenager's parents, Charlotte Charles and Tim Dunn, will travel to the US for a press conference Monday. It is unclear where that press conference will take place.

UK Prime Minister Boris Johnson earlier named the other driver as Anne Sacoolas, 42.

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