A Secretive Agency Hunts for China's Crooked Officials Worldwide

``Internationally, Sky Net staff members have a more delicate task. China and the U.S. have no extradition treaty. Instead, China generally must demonstrate to the U.S. that fugitives have broken the law. The two sides communicate on such matters through a body called the Joint Liaison Group on Law Enforcement Cooperation. U.S. officials have been more helpful on fugitives in the last two years, Fu says, but it's clear the U.S. -- with its processes for protecting the rights of the accused -- remains a headache.''