There is an entire industry of sorts built around the unnerving precociousness that pageant kids evoke, so when you throw in the added element of an unsolved murder, well you just might go spastic from the chill that Casting JonBenét’s trailer will send up your spine. For the Netflix documentary-narrative-feature hybrid, filmmakers went to Boulder, Colorado, the site of JonBenét Ramsey’s murder to “elicit responses, reflections and even performances from the local community.” Somehow, that intriguing conceit turned into a young Burke Ramsey stand-in terrifyingly intoning, “If you tell someone a secret, it’s no longer a secret.” The film debuts on Netflix on April 28.