FBI spent nearly decade pursuing spy suspects in bid to gain counterintelligence - washingtonpost

The Russian spy case that exploded into public view this week was preceded by nearly a decade of cat-and-mouse activities with the FBI, according to court documents and an interview with a senior U.S. official familiar with the case.

None of the suspects, who allegedly served as undercover agents for Moscow's foreign intelligence service, was arrested until Sunday. But a close examination of court documents indicates that by mid-2006 investigators had already searched the homes of four of the couples, planted microphones in at least three of their residences, regularly reviewed their encrypted computer messages, and videotaped meetings where money and equipment were exchanged. - FBI spent nearly decade pursuing spy suspects in bid to gain counterintelligence

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