[Dr. Franklin]

Once the perpetrator is back on U S soil we're no longer talking about a diplomat with diplomatic immunity, so there is nothing to waive. If the Brits want to have him returned to the UK they would have to issue a warrant for his arrest and request extradition. Waiving diplomatic immunity needs to be done while the perpetrator is still in the host country.

You need to educate yourself: Vienna Convention on Diplomatic Relations

[AlaskaErik]

You need to educate yourself: Vienna Convention on Diplomatic Relations

Show me where it states that diplomatic immunity can be waived once the person is no longer in the host country.