Naomi Herring, Oxford Mail Published 6:13 a.m. ET Oct. 7, 2019 OXFORD, United Kingdom – The wife of a U.S. diplomat has left the United Kingdom after becoming a suspect in the police investigation into a fatal road crash. Harry Dunn, 19, of Charlton, Banbury, died after his motorbike collided with a car near RAF Croughton in Northamptonshire on August 27. Northamptonshire police confirmed that a 42-year-old American woman being treated as a suspect in their investigations has left the country.