In “The Strange Case of Dr Jekyll and Mr Hyde,” the lawyer who investigates the mystery is Mr. Utterson, formally Gabriel John Utterson.
Utterson is a London solicitor and a close friend of Dr Henry Jekyll. His professional habits make him cautious, methodical, and committed to evidence, so he becomes the ideal investigator for a story built around secrecy and conflicting identities. He is disturbed by the connection between Jekyll and the sinister Edward Hyde, especially after hearing that Hyde trampled a child and later became linked to a brutal murder.
Rather than solving the case through dramatic detective work, Utterson pieces together testimony, documents, wills, and locked-room clues. His investigation gradually reveals that Hyde is not simply Jekyll’s associate but the darker identity created by Jekyll’s experiments.
Readers sometimes choose Dr Lanyon because he provides crucial scientific testimony, or Poole because he helps uncover the final secret at Jekyll’s house. However, Lanyon is Jekyll’s physician and friend, while Poole is his butler. Utterson is the novella’s central investigating viewpoint and the canonical answer.