Mafia 31. Twilight Dances.

And yes, now Lizard, Locky, and Archie, 3 mafia members, will start saying that Hostor is mafia and covering for Rimpel. Good luck, girls.

I won't start, because I just thought about that. Although, on the other hand, they are providing a clue and don't know what the main clue will be. Therefore, the fang could have been planted and used to frame anyone.
And in general, the mafia wouldn't frame their own with notes.