Lifestyle can be more relevent that prejudicial, here. Povides a passel o' folks with motive, opportunity and means.
Personally, I think there is as strong a circumstantial case against the parents as there is against DW, and they weren't even investigated. "Imagine" what would have happenned if they had been. They will be eventually. This little crew is not that strong. Eventually, someone will pull a Skakel. And the VD boys can't be kept quiet forever.