Cynthia Littleton Business EditorRodney Alcala, the serial murderer who became known as the “Dating Game Killer” because of his 1978 appearance on the game show, died July 24 at a hospital near California’s Corcoran state prison at the age of 77.Alcala’s chilling story provided an early glimpse of how the growth of unscripted television with everyday people would inevitably have a dark side.