Sadly, this was probably a wise choice given his age and the abuse suffered, abuse he seems blissfully unaware of for the most part. But I would hope that in five years, when these 'parents' are freed, the legal system doesn't rush to reunite the children with them. Not without enormous changes by them, and even then I'd be leery...
I hope that the legal system is working on terminating the parental rights of both of these...people. (I’d call them something else, but I don’t want to get banned.) I don’t think they should ever be allowed near the kids again and certainly they should not be in charge of them.