[. . .]

[she isn't certain about this, but. . . she feels like she should bring it up]

Week three. Chane said she was reading in the hotel alone at midnight, when Yuna, Natalie and I heard the gunshot.

Will made her story more believable by saying that Chane talked to him about reading that night earlier in the week.

If she was definitely a Bandit, then I think it's likely she was one in week three.