I read that a little differently. I haven't gone back and re-listened in the context of this discussion yet, but my memory of this scene played out something like: she's talking to Adnan's mother, and retains a "hmmmm" moment from the interview, at which point she interjects with "hear that? That was me being skeptical." Which is to say, I recall her using her initial skepticism as a jump-off point to reveal stuff she then found that undermines it. She never comes around to concluding that this was, as Sean put it, a To Kill a Mockingbird style racial conviction, but it seemed to me like her eyebrow was certainly raised a few times during that episode.
I'm going to go re-listen to that episode now to find out if I'm full of shit or not.