As for investigating, probably Darryl if you feel confident enough in that. Might give us an idea of who the power roles among town area, especially if they're in the hands of more experienced players.
Just trying to think how you'd play a PR without anything from D1.
Doctor: If you can protect yourself, then you would. If not, then....?? either someone you like as a player or a newbie is what I am thinking. Role Blocker: RNG ? Cop: If it's an old player, they'd probably look to someone who's been active/leader in the past. If it's a new player....RNG? SK: RNG? Vigi: Probably wouldn't use their kill N1......
If I were a cop as a new player, I'd personally start investigating people who have been active in the general thread who are also in this game. That assumes a degree of competence on the new player's part tho, which is obviously not guaranteed.