While the attacks in Lakeside will be more obvious and Forest Talkers could be caught in the act there and can absolutely be fought pre-attack — in Milton it's a little more insidious. The Forest Talker disguised as Interlopers are far more careful and will be unlikely to be caught — with the exception of the names of those revealed to be Forest Talkers in the second prompt.

That being said, those named NPCs have already been claimed as kills.