Murder in the Pullman
From a story by S.S Van Dine
There's no Philo Vance to be found in this short whodunit from 1932. Just a gold-digger and her new husband who are on their way to New York. Also on board, the woman's freshly jilted ex and her current boyfriend, who is something of a shady character. A certain Inspector Carr and Dr. Crabtree also happen to be on board, which comes in handy when the woman is found strangled.
Not a bad effort, but it's somewhat hampered by the short run time (24 minutes) and the fact that there are really only three suspects.