Orient Express

There's a murderer on this train... Maybe even several! Since yesterday, 2 of the passengers were missing and just last night we found the body of one of them. Mr. Hercule Poirot advised the conductor in charge and the train policeman to gather everyone, including himself, in the main restaurant. However, before the restaurant door was locked, you received a message from Mr. Poirot saying: “Do not come to the restaurant with the others. If I'm not mistaken, the murderer may be here among us, but not proof of his guilt. I left you a letter with all the information I have been able to gather so far. I'm going to use interrogations as a pretext so I can delay everyone for an hour,so you can find the culprit.