Mafia 103. Ice and Ash

I don't understand anything. The only thing I've figured out is that Rimp is trying to portray himself as a Checkmate, because if he isn't, then he's very likely Mafia. However, I also find it hard to believe that there were no Checkmates in the first night. I don't really want to vote for Rimp, because he's still under control. Master's description of the death doesn't seem like a Checkmate, more like a Doctor, but knowing Nebo's descriptions, anything is possible.
Uran has inspired trust until today, but remembering Revan's old games, he probably wouldn't actively advocate for an execution if he were Mafia. On the other hand, Heroist and Shaman are supporting the execution, and I don't have much trust in them...