A lot of the ones that do get broadcasted still end up being a relative too, but you wouldn't know unless you look into it after it get resolved and stops being talked about.

A lot of them are not even kidnapping in the colloquial sense. We hear "kidnapping" and think about being tied up in the trunk of a car but many of the actual kidnapping cases are more like "Bobby went to his divorced daddy's place for the weekend and hasn't been back on Monday." It's about the parents' custody and not about the kids' safety.