The two-part series on the 1996 murder of 6-year-old JonBenet Ramsey was actually quite valuable for resolving questions about that unsolved crime. They gathered top forensic specialists in several fields to reconsider evidence, interviewed detectives, FBI agents, the 911 operator, et al, who were involved in the case, showed video of the crime scene.
They constructed a compelling case that Burke, her 10-year-old brother, accidentally struck & killed the child with a flashlight in a fit of anger. The parents staged an intruder murder to protect their son from prosecution which explains why they refused to cooperate with the investigation.
It always seemed the police had bungled the investigation because the parents were obviously involved in some way. But according to this investigation, the police more than did their job & it was the district attorney who intentionally shielded the Ramsey parents from prosecution for covering up a crime. As a child of 10, Burke would not have been prosecuted for manslaughter. All those interviewed said the district attorney did so because of the immense wealth of the family.