Messieurs , mesdames , said Poirot , with a flourish , " let me introduce you to the murderer , Mr. Alfred Inglethorp ! " 164 Chapter 13 POIROT EXPLAINS " Poirot , you old villain , " I said , " I 've half a mind to strangle you !
Mr. Inglethorp introduces Poirot as the murderer to the audience , and Poirot responds with harsh skepticism .