Once the ruffian shoots his air gun, scoring a direct hit on Holmes's dummy across the street, Holmes and Watson are on him, and he is soon disarmed and restrained. While Watson knocks down the enemy, Holmes summons the police by blowing a whistle. They are led by Inspector Lestrade, who arrests the gunman. It is none other than Colonel Moran, Adair's whist partner, and the same man who threw rocks down on the ledge at Holmes at Reichenbach Falls. Holmes does not wish the police to press charges of attempted murder in connection with what Moran has just done. Instead, he tells Lestrade to charge him with actual murder, for Moran is the man who murdered Adair. The air gun, it turns out, has been specially designed to shoot revolver bullets, and a quick forensics check of the one that "killed" his dummy shows, as Holmes expected, that it matches the bullet used to kill Adair.