But why take loved children that will bring media attention and cause them to get caught when there are so many unwanted abused children they can take without raising much suspicion. Unless they thought they would take children of color who they assumed wouldn't get much media attention.
Statistics show most children that are trafficked come from dysfunctional, abusive homes who are easy to lure. Or runaways or kids on the streets a lot. Ages 12-14 is the most likely. Or they could be going younger since they are easier to groom.
ETA: Alhora doesn't seem to be a sex trafficking case. Seems she was just a mentally disturbed woman, or so they say.