Police wiretaps tracked the suspect's movements into the heart of an extremist underworld girding for a global offensive.警方通过窃听追踪嫌疑人的行踪，进入了一个极端地下组织的核心，发现他们正策动一场全球袭击。Investigators listened to the wiretaps for clues about the suspect's whereabouts.调查人员听了谈话录音以获得关于嫌疑人行踪的线索。