In the best of all possible worlds, the cops left bugs in place at the VDS home, and will monitor Papa. At some point, he could be picked up again. It would be nice to believe that he didn't cover for his son, but he ordered him to shut up, and this while a young girl was missing. Whatever the case, I don't think Papa VDS is under any illusions about J. And if J is guilty and gets off, they have to live with that knowledge.
Hersey, people like the VDS's have a mindset of "there is no wrong or right" and will sleep very well at night when there son(Monster)is released by the "PaidNFull" judge. He has the klintoonnesque syndrome, of what(is) sufficient evidence in this case.NSNR