How to spot whodunnit: academics find secret clues in Agatha Christie mysteries

To mark 125 years since the Queen of Crime’s birth, experts unravelled methods, motives and locations in her detective stories to find out how to deduce the killer

For almost 100 years, Agatha Christie has beguiled readers with her much-loved mysteries.

But now a panel of experts claims to have worked out how to answer the perennial question: whodunnit?

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