First, find the person to whom all 4 clues fit better than they fit you.
And another attempt by the Mafia to frame me with the word "Ironfist."
I think I understand what the 4th clue you were talking about is. It's the tea that the murderer drank with the toffees. ;)
Added 2 minutes later
Reggie, let's take into account the fact that not everyone watched South Park... even I don't remember Butter's name; I only know this character.
By the way... I'll have a suggestion for the next Mafia game. If anyone has a character from a game/movie/cartoon in their avatar or signature, they should mention it right away... before the game starts.