Nearly 30 years since her murder, revisiting the death of JonBenét Ramsey, the child beauty queen killed in her Colorado home, featuring interviews with key figures, including her father. Cold Case: Who Killed JonBenét Ramsey is an American 3-parts documentary series that explores, once more, the killing of JonBenét Ramsey, reexamining the case, missteps made by the media and law enforcement.