Right now, it's possible to interpret Doug's reasoning as understandable if he is Ru. Then Uranus is peaceful, and the Snowman is almost certainly Mafia.
We can also remember that Doug started the discussion about Shaman on the previous game day, even though there were already guesses about Jen Li.
Added 12 minutes later
And if we remember that on the second game day, Doug executed the non-verifiable Yashur-Rick, even though there was already one unsuccessful recruitment attempt by the Haven, while Uranus was the only one who supported the execution of Alex...
I'm rapidly growing suspicious that the first Mafia are Alex and Doug.
Added 35 minutes later
Do not execute the Snowman. Execute Alex.
Let there be a clear vote so that we don't have to guess later whether the leaders voted for him or if it was a defense against execution.