Well, for every Bible quote to make a point, there are others that contradict.
Lev 20:9 For every one that curseth his father or his mother shall be surely put to death: he hath cursed his father or his mother; his blood shall be upon him.
KJV
And there is Duet 21:18- 21. The bit about taking a stubborn and rebellious son to the elders, then off to the city gate to be stoned.
Lots of violence in the bible, I am not sure the Bible would be the best book to use here. As an atheist, I sometimes wonder how much violence religion causes. This family were Christian, and I wonder if this inquiry will touch on what sort of Christianity. was practised. The hell fire and brimstone sort ?
But yes, I agree that not many people could report their child to the Police. I don't think I could.