I confess to having reasonable doubt about whether Adnan killed Hae. I’m not talking about the courtroom kind, I’m talking about the normal person kind.
Koenig seems to try to confess to her audience in a attempt to keep her reader ethos look on her. Maybe thinking that this episode was so focused on sympathy to Adnan that she needed to tell her audience that she is being bias and that she is letting Adnan look like a good person. She does back it up with other people confirming this belief, which allows her to say this.