“White Elephant” at this year’s Hollywood Fringe Festival is a reading of a comedic mystery by Ryan Copple about a brother and sister who believe they have pulled off the perfect crime by murdering their mother to protect their inheritance. Things take a turn when the sister receives an unexpected gift: the murder weapon. From there, the story becomes less of a “whodunnit” and more of a “who knows it?” The set features eight chairs placed at either side of the stage. Christma