The adventures of Sherlock Holmes brought the writer ever increasing popularity. As a result, he began receiving letters with pleas for help in solving real crimes. Of all the (invariably petty) cases, only one attracted Conan Doyle’s attention.
In 1906, Sir Arthur Conan Doyle decided to prove the innocence of George Edalji, a man convicted of cattle mutilation. It took the writer only a couple of hours to refute the arguments put forward by the police and help the poor man to clear his name. And then, a few years later, Conan Doyle helped to acquit a person accused of murder.