I don't like the automatic "Law Enforcement" think, when kids are missing to look at the parents or family first, when there has never been any previous CPS or criminal history in the family.
That needs to be ruled out, but so many times, police seem to stop their investigation when they can't prove parent involvement. An example of this, is Jaycee Duggard, LEO wss so focused on her stepfather, who saw the kidnapping, they really never followed it up.
And like the kidnapping of "CS" in Australia. It was completely random that they found the perpetrator.
Things do happen, kids do get kidnapped, or lost.