Shamrock Rover
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Well, based on Oot's answers, is there a possibility that Rudy could be a bear? Maybe I misinterpreted his answer. If there is such a possibility, I would risk executing him. If not, I don't know, maybe clue #8 can help.
Rudy's behavior doesn't seem like that of a Mafia member, in my opinion. But in general, yes, he could be a bear.