“The U.S. Supreme Court has let stand a lower court ruling that allows police to warrantlessly track people’s location and movements through their personal cell phones, despite longstanding Fourth Amendment’s prohibitions against warrantless searches and seizures and growing concerns about the government’s massive surveillance networks. The Rutherford Institute had filed an amicus brief in Hammond v. U.S., challenging the practice as unconstitutional, especially when used by police to pinpoint a person’s location with much greater precision than ever before, whether that person is at home, at the library, a political event, a doctor’s office, etc.”