Yet, the Mom was given custody of the children instead of the Dad. And, the daughter is now in foster care instead of being with the Dad??
I think they're erring on the side of caution. Since this is such a hornet nest of passionate hate between these two, I think it's anybody's guess at this point who took that boy. Certainly doesn't appear to be random. And it seems like they may fear someone will abscond with the girl, too, if that child is still in the custody of this family.