'Casting JonBenet' explores how we see traumatic events

Six-year-old pageant queen JonBenet Ramsey was found murdered in the basement of her family’s home 21 years ago. The case was never solved. A new documentary about JonBenet doesn’t attempt to find out what really happened. Instead, “Casting JonBenet” is an experiment in the human imagination, from the grotesque to the traumatic.