Okay, here's the big question: is Cinda Canning capable of killing someone? Honestly, she probably is, but she doesn't have time to be bothered with frivolous things like that; she'd hire someone else to pull off the whole thing.
All we know about the murderer so far is that they had a matchbook on them from the local diner, wore all black clothing with a face covering, and coughed on that fateful night. A tiny part of me thinks that it could possibly be Jonathan (Jason Veasey), the man that Howard Morris is interested in, though that's only because we have him coughing on record.
But who would Cinda hire? Sure, she could've dumped her dirty work on Detective Kreps as the two had a pretty intimate working relationship as we know now, but that seems like too obvious of a choice. Perhaps it's Poppy, though she doesn't seem like the right fit for this type of crime, either.
Overall, my bet is that Glitter Guy and the murderer are two different people: Kreps is Glitter Guy, but someone else did the actual killing. My hope is that the person who murdered Bunny is someone totally out of left field and not Detective Kreps or Canning. It would be too much of a stretch for Canning to go to all of this trouble just to tank someone else's podcast. That is, unless she has unknown beef with someone in the trio.
I have to say, if it is Canning, it seems like a bit of an easy cop-out since we've spent so much time on the other parts of the investigation: the underground passageways, the moving of the painting, the secret elevator, and Lucy's involvement, just to name a few. And what about Amy Schumer? What ever happened to her? Actually, if Schumer did kill Bunny, it'd explain why she's been completely MIA for the majority of the season. Okay, I'm pulling for Schumer now.