Diplomatic immunity is not a "get out of jail free" card. It is often waived in cases of serious crimes, but there is the rub, the UK will have to present evidence that this was more than a simple accident which they have not done so far.
Last month, Mrs Sacoolas' lawyers were in talk for a "plea deal" with British prosecutors if she would avoid any jail time. The fact that the talks fell through strongly signals that the British want to send her to jail, no matter what the evidence shows.
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