Murder on the Orient Express
"If you confront anyone who has lied with the truth, they usually admit it – often out of sheer surprise. It is only necessary to guess right to produce your effect." (3.5.63)
"I wished to ask you, Mademoiselle, why you lied to us this morning?"
"Lied to you? I don't know what you mean."
"You concealed the fact that at the time of the Armstrong tragedy you were actually living in the house. You told me that you had never been in America."
He saw her flinch for a moment and then recover herself. (3.7.5-8)
"This," said Dr. Constantine, "is more wildly improbably than any roman policier I have ever read." (3.8.59)