Then it becomes you are walking down the street and see Suzuki leave the casino, or they overhear Suzuki talking about how he was gambling at 3am, or whatever else.
But like I said there isn't a right/wrong answer, I think what you want to see is the player ask questions like is this in the offseason, regular season, playoffs? Was there a curfew that was being broken? Was this the first time something like this happened or is it a pattern and shows that it's a real problem?
There is no right/wrong answer because there are good and bad no matter what you do. It's about the reasoning you use, if the answer is no because he's the C that's not good reasoning, but if the answer is no because if you rat out Suzuki it would cause internal strife and you think it's a better idea to get some teammates together and handle it amongst the players without management getting involved that's a better reason.