Мафия 15. Cosa Nostra.

It wasn't just a hit, he killed Freud (hopefully, no one has any doubts that Freud was a Mafia member). They took revenge, especially since Ali's words most likely referred to Aru; I assume that's what happened.

Ar is definitely a Mafia member (we both came up with this version at the same time based on the boxing clue). The Mafia blocked him, fearing that he would kill another Mafia member again through random moves.

Hmm... I still don't understand what happened on the first night. There was no mention of an attempted kill on a blocked player... But never mind.
My main assumption is that Arandor is the killer. This means he killed Freud for a valid reason – he accused him of being a Mafia member, and when the Brack version failed, he decided to kill him. But I meant that Arandor suspected SOMEONE ELSE from the Mafia, which is why he was blocked to prevent him from killing them.