Beauty and the beasts

Some 13 years ago, a six-year-old girl called JonBenet Ramsey was murdered in Boulder, Colorado. It was the only murder in the city that year, and a particularly brutal one; she had been dragged from her bed and apparently attacked with an electric cattle prod before being strangled. Which made it all the more astounding that the police quickly came to the conclusion that it was the parents who had killed her.