Poirot learns that Ratchett was actually Cassetti , a notorious gangster responsible for the kidnapping and murder of a young girl named Daisy Armstrong years earlier in America [2, 4, 6, 17].
A mysterious stranger boarded the train at a previous stop, murdered Ratchett, and escaped into the snow [4, 10]. Assassinio sull'Orient Express
With the train isolated from the outside world, Poirot interviews the twelve other passengers in the Calais carriage [5, 6, 23]. He discovers that many of them have hidden connections to the Armstrong family [6, 7, 20, 22]. The Resolution: A Moral Dilemma Poirot learns that Ratchett was actually Cassetti ,