Clench (65)

"And my answer is just as simple," Lestrade shot back, folding his arms, clenching his fists. He tipped his chin up, looking at the man. "If you'd wanted to make things difficult for my wife, you'd have done it already."

The man laughed, swinging the umbrella down and leaning on it. "Very good, Detective Sergeant, so you obviously can see now that what I am asking is just a request. If you don't wish for credit that can be arranged. What I'm seeking is a distraction for someone else."

"Still doesn't answer why you picked me."