8 replies? Are you guys crazy? Okay Okay... Let's sort this out:
CaptainD: Was there something dangerous in the train wagon? NOPE
Mandle: How many other people were in the train with him? HAHAHAHAHA
Gurok: Was he alive when he got on? (Just making sure this isn't one of those riddles.) YES
Selmiak: was he murdered? NOPE
Stupot+: Was the train guard also dead? NOPE (damn english. I would use "beside" in that case

)
Tabata: Was he shot? NOPE
Mandle: Were there other people in the train with him? Perhaps. It's irrelevant
Danvzare: See Selmiak --> NOPE