Persona non grata. Deport him immediately. If the father complains, then deport the entire family. /spit
This is the only correct and only proper response. Thus, we can be assured it won’t take place.
Expel the entire family. Allow the boy to leave the country - on a flight to Tehran.
Of course, I always thought that the Americans should have waived diplomatic immunity for the spy that killed the guy in England and sent her back to serve time. https://en.wikipedia.org/wiki/Death_of_Harry_Dunn