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Vis, explain yourself and make up your mind. Either you support the idea that he's a Mafia member but don't think it's necessary to condemn him now, or you disagree with the interpretation of the evidence.
In the first case, explain what beneficial actions you expect from the Mafia member for the town. In addition, say what you would do in his place.
In the second case, explain what you don't like about this version regarding TaCo. In my opinion, it fits perfectly, with no inconsistencies – it immediately explains why the Mafia member is described as drinking, smoking, and being called an angel. Not an angel, actually, but rather the opposite.
And keep in mind that if you don't want to do this, I will consider you a Mafia member voting against your own faction to cover it up.