People are not supposed to become zombies in town when the priest is alive. They're omens when the priest dies. Same with sewers, actually, in the code. They keep spawning in the keep and such too.
Got a verified case of this happening - Round Sparrow210-16.56.01 at around round time 35 minutes - Grog the prisoner is executed in town WITH the priest alive, IN the town square, and rises as a zombie.
People are not supposed to become zombies in town when the priest is alive. They're omens when the priest dies. Same with sewers, actually, in the code. They keep spawning in the keep and such too.