When I hear about cases like these it always reminds me of a Hawaii case...the parents were on TV every year pleading for their children and even became very active in cases of other parents' missing children. 20 years later, police found the boy buried in his parents' backyard... They claimed he died after failing to seek medical attention following an accident. I think he was murdered... I have a strong feeling that, just like sexual abuse, most children are murdered by people they know and are also close to...
Unfortunately, parents trust those they shouldn't...
rest in peace little one