How did abilene figure out sister redempta is the rattler moon over manifest?

In "Moon Over Manifest," Abilene discovers Sister Redempta's true identity as the Rattler through a combination of her investigative skills and conversations with other characters. She pieces together clues from stories and interactions that reveal the nun's hidden past and connection to the town's history. Ultimately, it is a mix of her curiOSity and the unfolding narrative that leads her to this revelation.