What is the name of the detective inspector who often works with Holmes?

The detective inspector who often works with Holmes is Inspector Lestrade. He is a Scotland Yard officer and one of the most recurring police figures in Arthur Conan Doyle’s Holmes stories.

Lestrade first appears in A Study in Scarlet, the 1887 novel that introduced Sherlock Holmes and Dr. Watson. Doyle presents him as energetic, determined, and experienced, but also conventional in his investigative methods. Holmes sometimes criticizes his lack of imagination, yet he respects Lestrade’s persistence and increasingly treats him as a valued professional colleague.

Lestrade is often confused with Inspector Tobias Gregson, another Scotland Yard detective who appears alongside him in A Study in Scarlet. Gregson and Lestrade are described as rivals, but both regularly consult Holmes. Lestrade’s first name is never established in the original stories; only the initial “G.” is given. In later adaptations, his first name and personality are frequently changed.