We have the better part of 3 days, so I'm not sure why the hurry to jump on the Numbers bandwagon. He gave useful information yesterday and drew attention to himself that he didn't need to, and he also immediately claimed responsibility for the 2nd kill last night and asked us to give him guidance to use another shot.
This is a really easy situation to work out honestly. If Numbers lives through tonight, the odds will be pretty high that he's scum. And if he isn't and the mafia want us to kill him for them, then he'll presumably have another flip to give us and lynching him will serve to confirm whether his claims are true or not.
As it stands now, his play reads town and while there is some WIFOM as to whether he has any shots left or not, if we lynch him today and he has been honest all we get is a dead townie who could possibly have done another kill (which he submitted a request for the town to advise with) and confirmation that Laarz was scum.
If; however, we let him go into tonight, then there is potentially much more to be gained, and he can still be lynched tomorrow to confirm if that's necessary. Frankly, I don't see why we should lynch him and do the scum's job for them if he is telling the truth. If he has night kills left and already took out one scum, they aren't going to want to leave him around in hopes that he's only got one or two shots.