Tim Dunn
A spokesperson for Dunn's parents said the decision was 'further compounding the family's misery'.
The president said Boris Johnson had personally asked to set up a meeting between Dunn's parents and Anne Sacoolas.
The teen's father, Tim, said: "They made a mistake, someone has made a mistake."
The wife of a US diplomat is suspected of involvement in the teenager's death, and the case has sparked a massive international row.