Мафия 2. The City of Lost Heaven

I insist that Nera should be executed – there are no other options.
And if the Butterfly comes to me, and not to the Lizard, he will have a chance to kill Stan – meaning we will get another corpse and another suspect. He probably won't do that, though... Then we'll have to hang one of them, or maybe both, just in case. Doc, where's the beer?7

Added 28 minutes later

So, I think we should send the commissioner (or sergeant, whoever is left) to Nera tonight.

That is, Nera is the leader? :)

And finally, I don't think the mafia sends the same killer every night so that he can be exposed more quickly; they most likely take turns so that evidence doesn't accumulate on the same person, but I don't know for sure – we need to ask former mobsters.

Let's assume that yesterday's culprit was Stan. Yesterday, they successfully had Zubr executed, but doubts remain among the masses. It makes sense for the mafia to frame Stan again, rather than expose the other mafia members.
Let's assume that yesterday's culprit was Zubr. Then, of course, someone else will have to do it; Zubr won't go again.

Added 57 seconds later
Doc, I feel sick...