It's not criminal negligence to fail to lock up your weird child. I mean, we don't know how weird he was. The golf club thing is bad, but it may have been a total accident, or he just didn't comprehend the seriousness at 6. It doesn't mean that it was the start of several murder attempts. The only way I could see the Ramseys getting indicted on that is if there was evidence Burke repeatedly preyed on JonBenet and injured her or molested her and yet kind of stood by and watched. I don't see that happening. Unfortunately, many kids live with violent or mentally ill siblings, and that's not a crime. Social services may remove them, but it's not considered the parents' fault as long as they are pursuing proper medical care and calling the authorities if behavior is so out of control that hospitalization is needed. Unfortunately, parents with these types of kids don't have many options, and they try to find ways to stabilize them, but chaining them up probably doesn't help.