Patty Hearst, newspaper heiress kidnapped by the Symbionese Liberation Army at 19, joined her captors in a bank robbery and was sentenced to prison. The 50th anniversary of the event raised questions about Stockholm syndrome. Hearst's life after her trial is a subject of speculation and she has been in the news recently for her prize-winning dogs. Her story is the subject of journalist Roger D. Rapoport's new book, 'Searching for Patty Hearst: A Novel.'