I’ve looked up some more incidents, this is normal US policy, if US military personnel or diplomats are involved in court action they are always sent home, usually they are prosecuted in a US court. If as reported the woman absently mindedly drove on the wrong side of the road, it is Careless Driving and she is not going to be extradited for that.
I’m sorry that the family dont believe they have had justice but it seems to me if she was on the wrong side of the road there is no defense and a driving ban would be the sentence, no more.
So why the publicity for this case, because the US apply this repatriation for all cases regardless and this frustrates “British Justice” and we are trying to get that changed - we will fail!. The US wants their citizens to face US justice, not the kind of justice that is handed out in other countries, if a US service person commits a crime overseas they are in big trouble, not a normal jury court but a court marshal.c