The lawsuit by a University of Maryland police trainee who was shot in the head during a training session — which was revived by the 4th U.S. Circuit Court of Appeals over the summer — should begin moving forward again after the deadline to petition for Supreme Court review passed this week. The 4th Circuit ruled in Raymond Gray’s case July 27 and the defendants’ 90-day period to petition for a writ of certiorari ran out Wednesday. Gray was shot in Owings Mills when William S