Jordan v. United States

(1) Whether the trial court's order granting a request by the accused's codefendant to prohibit the accused from testifying about details that were exculpatory to the accused but prejudicial to his codefendant constituted an impermissible limitation on the accused's right to testify in his own behalf as set forth in Rock v. Arkansas; and (2) whether the Fourth Amendment requires law enforcement to obtain a warrant to acquire cell-site location information used to track and reconstruct the location and movements of cell-phone users over extended periods of time.