I'm always leery to take a claim at face value - understandably, I hope. That said, I was a bit suspicious of Fel Day One, but thought he comported himself well under C_K's pressure. In my head, his post cleared him of most of my suspicion - right up to the claim.
If mafia have a role blocker, we now know who's the target...
Im not 100% sure about this, so I will throw out my thought process for everyone else to mull over.
Fel was all over the place prior to cop claim. He could have been all over the place because he knew shock was mafia from his night action, and was trying to find a way to lead us there without outright stating that, and sucked at it.
Alternatively...
Prior to his cop claim I asked if any investigative roles had anything to bring to the table. He then copped up. This could be simply in response + his going away for a few days, or it could be seizing an opportunity. The opportunity to claim cop, throw the unpowered mafia role who was already pretty screwed into the line of fire, and shelter safely behind the protection this claim granted him. Following that he simply claims role blocked, as suggested by Zherog, and helplessly throws his arms up in the air in frustration. And for the cherry on top, they kill Zherog, one of the least active members and therefore not a lot of vocal suspicions to work with, and immediately asks the group to look for some ulterior motive for Zherogs death.
It could be a pretty clever plan to hide in plain sight, or I could simply be reading too much into his day 1 actions, and clumsy attempts to guide us to shock day 2 prior to his claim. Being so uncertain, its not something Im prepared to put a vote behind. But I've shared it, and maybe now people can desconstruct it and point out to me why it doesnt work, or at least not automatically give Fel a free pass.