How Many GPS Devices Was The FBI Monitoring Before The Supreme Court Said No?

3,000, according to a story in the Wall Street Journal. After the Supreme Court ruled in U.S. v. Jones that the use of the monitoring devices without a warrant violated the 4th amendment, the FBI actually had to petition courts to turn some of them on, briefly, in order to locate and retrieve them. Andrew Weissmann, general counsel for the FBI, told a gathering at the University of San Francisco that the ruling has caused a “sea change” inside the U.S. Justice Department.