i normally point to animal predation in these cases and make the argument that human children are actually a prey item for a variety of top predators, including cougars, wolves and bears.
however, my understanding is that there is evidence that these kids were removed from the property by a waiting vehicle on the night of their disappearance and this is probably a trafficking case. they could e anywhere, but they aren't on the farm. and they could be in any state of existence.