There's a LOT to go through, so I'll put the thesis first:
I think it's Wonda/Zuri.
I have no reason to lie about what I saw last night. I admit I was a bit hasty to assume Gecko was the killer when there could very well be another wolf out there who did the kill. That doesn't take Gecko off my sus list entirely, but...
The more I think about it, the more it makes no sense that Gecko would have claimed no night action. They could have just said "Oh, I used my post restrict on beep but she's dead because someone else killed her" (and that would make sense why I saw them interact with beep). Instead, she admitted to not using an action at all. It could be a sympathy move, it could be a lie. I don't know. But it seems like a silly lie to make when I "saw" it happen and several people confirmed independent facts that match up with what we know happened.
What I think happened then, when you add in my information, runner's confirmation that he meant to track Gecko, and fluff's confirmation that she swapped us, is that a third party did the kill and Gecko was framed.
Which third party? One of Wonda or Zuri.
Wonda has a power that she's not disclosing to us and apparently it's "very unlikely to happen".... okay.
Zuri jailed Wonda, but my mandator confirmed that wolves can still perform faction kills while also using a power.
I think either
1) Zuri jailed Wonda so that Wonda has credibility and we'll continue believing her ("she can't have killed while she was jailed!")
2) Zuri never jailed Wonda at all; if they're both wolves they can say whatever they want and we can't confirm it, which leaves either of them open to perform the kill
I have more thoughts but it's getting later so I want to get this vote in and then will continue typing.
I'm going to
unvote @GeckoKD6, vote Wonda
@kaydubs @WildZoo
If Wonda flips wolf tonight Zuri is tomorrow.
(Actually if Wonda isn't wolf tonight Zuri is still on the board for tmrw)
And maybe tonight, Zuri, you can jail someone we know is a confirmed villager so some "safe"/clears have proof your ability works. Maybe katykat? Which, by the way, I thought you were going to do last night to prove your credibility, but Wonda is NOT a confirmed villager and could just be corroborating whatever story you're feeding her.