The American Civil Liberties Union [official website] (ACLU) on Tuesday asked [amicus brief, PDF] the US Court of Appeals for the Sixth Circuit [official website] to reconsider a case in which it decided [opinion, PDF; JURIST report] last month that police use of GPS tracking on a person's cell phone is not an illegal search under the Fourth Amendment [text]. The ACLU asserts that this decision "is an unusually important and weighty precedent given its status as the first appellate decision in the nation to apply [United States v. Jones] to GPS tracking via cell phones and severely undercuts...