Parliament expects the Crown Prosecution Service to shows its independence from the police, but no Crown Prosecution Service office will be able to function at its best unless the relationship with the local police is close and mutual confidence is high. It is the duty of the police to trace and interview witnesses, including experts and to inform the media of names of defendants, charges, and the state of inquiries or prosecution. International cooperation, however, is encumbered by the British legal system requirement that witnesses give oral evidence in person. This has resulted in witnesses from abroad failing to appear as promised at hearings. Another factor is that the United Kingdom is regarded as a country from which extradition is virtually impossible as a result of English rules of evidence and taking of evidence on oath. Procedures for improving these situations are discussed.