From The Perry Mason TV Show Book
Ruth Prescott wants to divorce her husband Walter so she can be with true love Jimmy MacLaine. After a brush with death, Ruth is convinced her husband is trying to kill her. When Walter turns up dead instead, the police believe Ruth shot him, but Perry doesn't think so. A lame canary and unusual bruises on the victim puzzle our young lawyer, if only momentarily.

The ending is quite humorous: "A Lame Canary turns out to be a Stool Pigeon"