The special counsel's report discloses the use of this investigative technique, by which police determine a suspect';s location via a cell phone GPS signal.
The Prince narrative is one instance in unredacted sections of the report in which Mr. Mueller's team explicitly disclosed cell phone tracking. It raises the question of whether the FBI applied the process to other
The fact Mr. Mueller could pinpoint Mr. Prince's exact whereabouts suggest he used GPS readouts, which prosecutors can subpoena from cellular service providers.