The Adventure of the Norwood Builder

In "The Adventure of the Norwood Builder", a young lawyer asks Holmes to clear him of the charge murdering a rich man soon after preparing the man's will. Inspector Lestrade is convinced of the young attorney's guilt and believes he has finally bested Holmes, but by the use of forensic science and a bogus house fire, Holmes is able to exonerate the young lawyer while proving he was set-up.