Kitty Green's new film, Casting JonBenet, is an experiment in nonfiction storytelling. The documentary shows a series of people from Boulder, Colorado, auditioning for roles in a movie about the infamous 1996 murder. Green never really intended to film a reenactment of the crime, but it was hard to explain to the actors what she did intend. She tells us how she got people on board and speculates on the reasons behind the country's continued fascination with the still unsolved murder.