A Los Angeles County judge has denied a request by the granddaughter of Sumner Redstone to join the contentious court battle over whether the media mogul is mentally competent. According to Reuters, the request by the ailing tycoon’s 34-year-old granddaughter, Keryn Redstone, came just two weeks before the May 6 trial which could have far-reaching ramifications for Redstone’s Viacom and CBS corporate empire.