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The note doesn't make sense. It's clearly a setup to eliminate a peaceful player. Let me explain:
If the "red" boss wanted to help the town, he would have coordinated with his allies instead of sacrificing his own teammate and handing victory to the blue mafia. Also, the note only mentions two mafia members (although I'm sure Morny is one of them), and the name of the "last" deceased player is not mentioned. It's obvious that the "boss" doesn't know the name of the "remaining" (though dead) mafia member. The note doesn't make any logical sense, so I advise the townspeople to pay attention to other players. In particular, to Arandor, who immediately after the "new day" was announced, rushed to vote against me.