From The Perry Mason TV Show Book (Revised)
Richard Harris is the author of Dishonored: The True Story of Community, an exposé of Cliffside Heights. The citizens are so incensed about the book that a group of them hire Perry to sue Harris for libel. Perry procures an out-of-court settlement, but Harris has some hold over his publisher, Albert McCann, who reneges on the deal.
When Harris is killed, Perry finds himself back in court with another murder trial. The defendant is Cliffside Heights resident Margaret Layton. She was once married to Harris and desperately wants to keep her children from learning who their father is. The police think that’s a sufficient motive for murder.