If anyone can help, that would be great!!!

Hi , i'm playing Agatha Christie Murder on the Orient Express. I'm up to part 3, and I've seen alot of blogs on this part,but I havent found the answer. I've colloected all the evidence( I think) but something is missing. It askes you to search the train for evidance that the suspects may be lying about their pasts, and then to question the suspects. I've gone to the salon car to question the suspects but non one will talk to me....what am I missing??? You know, in Nancy Drew games there is a checklist that you use to make sure you've done everything you need to do, I wish this game had that, that way you could see what you need to do next. Anyway, if anyone has played this game and could help me, it would be most appricated!!! Thanks to all the fishes!!! Paula

This does have a checklist. [And Nancy Drew Senior Detective turns the tasklist off]. Look at Poirot's instructions in your journal.
Have you taken all of the fingerprints from people and things? Have you compared both to see whose fingerprint is on what? Have you finished the radio?
Have you spoken to Barnaby? [This is several times, with talking to Poirot in between].

Thanks alot Mr Russ, I knew I could count on you!! There were some things I missed, like the knife on the ledge.....and another fingerprint. I made it through and finished. Loved the game and am now playing the new Nancy Drew, Warnings at Waverly Academy!!! This game is SICK, and I mean that in a good way!! Paula