They are led by Inspector Lestrade, who arrests the gunman.

That's when he hit upon the idea of giving Inspector Lestrade a unifying role.

Holmes once more solves the puzzle to the chagrin of Inspector Lestrade.

Inspector Lestrade rarely received this kind of appreciation from Holmes.

Inspector Lestrade also appears in the story.

Inspector Lestrade does quite a bit of gloating in this story, for it seems that he is on the right track and Holmes is not.

The good doctor is exactly right, Inspector Lestrade.

I recommend informing Inspector Lestrade, after swearing him to secrecy.

Inspector Lestrade calls Holmes to the murder scene to examine something odd.

Inspector Lestrade might have been a paid source.