悬崖上的谋杀 Marple: Why Didn't They Ask Evans?

While visiting her friend Marjorie Attfield, Miss Marple learns that her son Bobby had recently found a body, identified as a Mr. Pritchard, on the cliff side. He's received a letter asking him to appear at the enquiry but it seems to be a wild goose chase meant to keep him away from the real enquiry taking place elsewhere. Now accompanied by a friend, Frankie Derwent, they tra...