Orient Express

There is a murderer on this train... Perhaps even several! Since yesterday, 2 passengers have been reported missing and just last night we found the body of one of them. Mr. Hercule Poirot advised the Train Chief in charge and the Train Policeman to gather everyone, including himself, in the main dining car. 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 am not mistaken, the murderer may be here among us but not the evidence of his guilt. I have left you a letter with all the information I have been able to gather so far. I will pretend to hold interviews to be able to delay everyone for an hour, so you can find the culprit. It's your turn! Good luck.