It would be very easy for a scum to claim they had been poisoned to draw out the hypothetical healer.
Fortunately or unfortunately, no risk on that side. Unfortunately because as I don't know to whom I owe my life, I still have to work with the same number of suspects in front of me. Fortunately because there's no risk to trick someone by claiming to be poisoned.
The only benefit I see, for a mafioso, in claiming to be poisoned, is that it makes him look quite townie. So, here, keeping a "wifom" in mind (remembering to not assume anything about a poisoned person's affiliation) may be useful, and may neutralise this risk.
It's hard though, because there's a lack of evidence floating around at the moment (and with you stating that you might be lying, it does make my head spin a bit). It's hard for a mafia though to use this without evidence. But there's nothing I can really do but speculate here, so I'm just going to let it rest for the time being.
What I would like to do, is try to analyze everything surrounding Vitek's lynchwagon. Admittedly, it's going to be a hard sell for any theories, but I think it's worth a shot. At the very least we have something concrete there.
I've been throwing this around in my head, and I have to put this out there: I don't think there's more then 1 mafia on this wagon. The reasoning being, that a lynch like this came by pretty quickly, which leads me to believe that not all of the mafia would have had a chance to create a convincing argument to get onto the wagon, hell maybe they were taken off guard.
Hell, there might not even be any mafia on the lynch. Possibly they didn't foresee Vitek pushing SPF to vote for him and then hammering himself. Or as it got closer they figured it was safer for them to be off the lynch altogether. You don't really need an explanation to stay off a wagon, you do need a good one when you're on it though.
The other major theory is that most, if not all of the mafia are on the wagon, which would have been an oddly concentrated effort, especially considering the possibilities there. True, no one could have foreseen what happened and the mafia all got caught with their pants down, but, again, I just don't find this very likely. They'd still have to explain their votes, and most of the reasoning might have been sound early on (For pressure votes), but they're not really reason enough to lynch him. Hell I stand by my reasons for voting, and I can tell you that I don't think it would have been reason enough to lynch Vitek.
I don't know, I'm trying to think this through, but I'm having trouble with a starting point...it just feels very abnormal, but right now it's the only concrete thing we have.