Concern trolling is raising ostensibly genuine concerns in a disingenuous way to covertly derail or poison discussion while having a superficially plausible fallback story if accused.
It comes up in political discussions online, where members of a given faction will be debating how to approach a policy question, and someone outside the faction arrives to give their opinion and concerns. This person might be genuine or might not, but you would be suspicious of the motives of an outsider coming in and trying to steer the discourse a certain way.
In this context, you essentially agreed with my premise that we should treat Chaqa as a solved question unless a living player counterclaims, due to the low likelihood of a dead player being the real Cop, but were still finding a way to use it to suspect me. I’ll grant you that you could have genuinely been concerned about my progression (which is why I framed it with the gentler “feels like concern trolling” rather than “is concern trolling”), but on reflection it comes off like mafia fishing for a reason to suspect someone in the pool rather than as genuine interest in the question.
Your position also takes the posture that we should leave options open with respect to the clears, while still siding with treating them as clears, which strikes me as the angle mafia would take. (This is not a very powerful argument though as it’s also a plausible town stance.)