Questions on Diplomatic immunity for a novel?

Question

If the daughter (17-18) of a diplomat Whom has full immunity get caught harboring an escaped prisoner of war , can she be convicted of the crimes if her own country will not lift her immunity Or does she not get immunity at all?

Answer 1

Usually there is a formal protest of the local government sent to other government along with a notice of expulsion of the diplomats and their family, because declared undesirable.

Answer 2

The daughter also gets full immunity.  She gets extradited to her own country and is to be tried there.