blanche to commit any crime without punishment. If a person  with diplomatic immunity commits a crime, law enforcement has to  contact the host country, then the diplomat either has his immunity  revoked for trial or gets deported back to his/her own country to  face consequences there. Arjen Rudd would certainly face (at best)  life in prison after shooting a cop in cold blood: the South African  government would give him up rather than face an international  incident.