Short story about the glove with climax and theme?

I think the climax is when (Dunne was thinking that they intended taking no chances, when his foot touched something on the floor. He stooped to pick it up and suddenly felt queer. Then the inspector switched on the light. Dunne looked at the article in his hand. It was the glove which he thought he had left in the room with the murdered man and which he had gone back to find!)