With a plot that echoes a well-known Hollywood masterpiece, a trial began Tuesday for a Florida woman accused of helping orchestrate the death of her husband in order to secure a massive insurance payout. Prosecutors contended that Denise Williams planned the December 2000 slaying of her husband with a man that she was having an affair with and later married. On a cold morning in north Florida, Mike Williams disappeared while duck hunting on a large lake near Tallahassee, and initially it was believed that he had fallen from his boat and that his body had been devoured by alligators. His disappearance triggered a massive search by local and state authorities.