This episode has been used by the U.K. authorities to try to get the US immunity issue changed, the family’s grief has been used for political purposes. I particularly criticize the police for starting this campaign they should have accepted the status quo, now it has gone all the way to the White House and a firm “she stays in the US” has been established.
She has not been identified on camera, all we have seen is a wedding photograph, so the US military want to keep it that way, which is why she was sent back in the first place. Wether diplomatic immunity was official is uncertain, her husband is probably a high ranking spook about whom we have heard nothing, the US don’t want him identified through her. In short the families emotions are second to the security risks, and sometimes we have to accept “that is the way it is”.
The US is pretty much omnipotent and this is a very small issue in relationship terms, they can send a drone halfway round the globe to kill a suspected terrorist and maybe dozens of others closeby, no judge, no jury just intelligence, again “that’s the way it is” and nothings going to change.