It's unclear why Ollie is being so distant. One possibility is that Makani’s story about her past may have caused some of Ollie’s personal demons to surface. Local rumors claim that he went through something of a tumultuous time following his parents’ deaths, and perhaps he, like Makani, struggles to reconcile his flawed past self with his present self. Finally, that Makani and her friends combat David’s murderous rampage by banding together and helping others points to the book’s overarching insistence that community and solidarity can be helpful tools for working through trauma and coping with hardship.