The roster of writers participating in the second annual International Mystery Writers Festival in Owensboro Kentucky just keeps getting more and more impressive. LAW AND ORDER showrunner Rene Balcer has been added to an impressive list of speakers that includes CSI creator/showrunner Anthony Zuiker, author Mary Higgins Clark, and actor/author Gene Hackman. The Festival, which features the world premiere of half-a-dozen mystery themed plays, starts June 12 and runs through the 23rd.