Why Didn't They Ask Evans?
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Why Didn't They Ask Evans? (published in 1934), also known as The Boomerang Clue, is a murder mystery novel by Agatha Christie.
Bobby Jones climbs down to get his golf ball from the bottom of a cliff, and finds a dying man, who utters his last words: "Why didn't they ask Evans?" Intrigued, Bobby and his friend Lady Frances Derwent put their own lives in danger to find out what happened to the dead man, and just who Evans is. There is a likely suspect but his charming personality puts them off his scent before they have properly investigated, though they eventually realise their mistake.
[edit] Film versions
Adapted in 1981.