What strikes me about the case is that there appears to be a form of self reliance within the family. A belief that they can remain private and deal with whatever life throws at them, themselves, rather than seeking out help and engagement with state sponsored agencies. I think that certainly Dawns psychological profile reflects this.
Karl, has undiagnosed leaning difficulties and Denise appears to have managed to adequately care for him over his 47 years without Social Services. The 'stillborn' baby was not registered, nor medical attention asked for for mother or baby, without this interface it became impossible for Dawn to then get the baby buried. Jordan 'refused' to seek medical assistance, and none was sought on his behalf until it was clear (to the family) that he was dying. Jordan finished his education through homeschooling. I would guess that Denise's husband was not engaged with Mental Health Services before his suicide either. Were police involved in the incidents of anti-social behaviour? I'm not sure if we were told that, or not.
Taking the witnesses word at truth - I do ask myself what difference it would have made IF they had sought out being monitored by the agencies responsible for recording all these events/situations and employing professionals to assist - my answer would be 'negligible difference in all honesty, except to offer support to the ones who are in the dock today'. Perhaps with the exception of Jordan (which of course is crucial) but only providing that he wanted to engage and receive help. If what they say is true, and he wouldn't have listened; taken medication; allowed for a sustenance drip and hospitalisation and rehabilitation, then monitoring - it wouldn't have made any difference - I don't think they could have forced him, anymore so than the family could have done - unless they sectioned him - which is probably what would have happened??? Its all so so sad.
Excuse my lack of correct terminologies. My own opinion only.