Judicial oversight of GCHQ's conduct is exercised by the Investigatory Powers Tribunal. Judicial oversight of the service's conduct is exercised by the Investigatory Powers Tribunal. Investigatory and regulatory hearings are open to intervenors. Forde said that her prosecution was prompted by improper investigatory work. Grand juries perform both accusatory and investigatory functions. It is rather a professional external investigatory audit agency. A number of offences have been prosecuted involving the abuse of investigatory powers. The bill would amend the Regulation of Investigatory Powers Act 2000. Liberty's challenge to various parts of the Investigatory Powers Act is ongoing. Staffordshire Chief Constable Captain Anson was an administrator without experience of investigatory police work. An investigatory stop is a seizure under the Fourth Amendment. The U.S. Attorney's Manual anticipates the possibility of allowing investigatory targets to testify. The Data Retention and Investigatory Powers Act came into force in 2014. Search authority during a Terry stop (investigatory stop) is limited to weapons only. Act 2000 and the Regulation of Investigatory Powers (British Broadcasting Corporation) Order 2001.