If Volt is scum, then you+XP are cleared. His partner has to be Hydrad (But that implies there's an SK...) or {Liopoil, Kingzog, Eevee}.
Can Hydrad be Mafia?
If it's Volt+Hydrad, then the rolls were MMDDTTT: TTT = 2 Goons + Roleblocker, Serial Killer (Investigation Immune OR 1-Shot Bulletproof). Not possible because we know there's a Godfather. Okay, can't be that.
If Hydrad is lying and Volt is telling the truth, then it's MMDDCCT, so T=Goon + Roleblocker + Godfather, Serial Killer (Investigation Immune OR 1-Shot Bulletproof). Then two Vanilla claims are Goon and Godfather and Hydrad is SK, or Hydrad is Mafia with a Vanilla and there's another SK.
I'm finding the Hydrad lying thing to be unlikely.
Looks like it's either:
1) Silver+XP (not too likely in my eyes)
2) Volt+{Liopoil, Kingzog, Eevee}
3) Any two of {Liopoil, Kingzog, Eevee}.
You guys can consider the case where I'm scum if you'd like, but I'm obv!town here.