Sleuthing sheep, Young Sherlock and a new Poirot: how amateur detectives took over our screens

From the Sherlock Holmes spin-offs to The Sheep Detectives, DIY sleuths are on the case all over TV and cinema. But where did the trope of the outsider who outsmarts the professionals come from – and how do these depictions compare to reality?

Raccontata datheguardian.com