anne sacoolas
The Home Office submitted the extradition bid on Friday.
A spokesperson for the family also said they were taking claims made by the Trump administration "with a pinch of salt".
The 42-year-old, who is married to a US intelligence officer, is accused of driving the car that hit and killed the Northamptonshire teenager.
“She’s just going about doing whatever she would usually do as though nothing’s ever happened."
The 19-year-old was killed in a motorbike crash in Northamptonshire on August 27.
The president said Boris Johnson had personally asked to set up a meeting between Dunn's parents and Anne Sacoolas.
Dunn's mother and father pleaded for Anne Sacoolas to "get on the plane and get back to the UK, just do the right thing."
Suspect Anne Sacoolas said she had been 'devastated' by the 'tragic accident'.