CELL PHONE TRACKING:  We all know our cell phones can be used to track our whereabouts. But did you know that cell phone companies routinely turn over such data to law enforcement without a warrant (charging a pretty penny to do so)?  Does this violate the Fourth Amendment’s prohibition against unreasonable searches and seizures? The U.S. Supreme Court unanimously decided this summer, in U.S. v. Jones, that attaching a GPS to a car constitutes a “search” for purposes of the Fourth Amendment.