The term of art is "parallel reconstruction." In presenting law enforcement with ill-gotten information, the intelligence service also provides a plausible acco

The term of art is "parallel reconstruction." In presenting law enforcement with ill-gotten information, the intelligence service also provides a plausible account of how law enforcement could have gotten the information in another Constitutionally sound way, including the all-important articulable cause for suspicion that would make this entirely fictional series of events legally admissible in court. In essence, it's a process whereby intelligence services and law enforcement agencies conspire to knowingly violate the civil rights of the people they target while perpetrating an overt fraud upon the court - all in the name of "protecting national security."