Detailed Explanation
Season 2's killer was Poppy White (Adina Verson), Oliver's seemingly meek assistant. Poppy was actually Becky Butler, the girl everyone thought had been murdered in Oklahoma years ago. Bunny had discovered Poppy's true identity when researching art forgeries. The reveal connected to themes of reinvention and the dark side of true crime obsession, as Poppy had become obsessed with disappearing into a new life.