Should people wanting to adopt children from another country get approval from social service?

I recently heard about the case of two christian fundamentalist who adopted 3 small children from Africa and beat two of the siblings. They killed the 7 year old and the 11 year old was injured pretty bad.
I don’t want this to turn into a conversation about religion. Obviously these people were mental. According to stories, they beat the adoptive children more than their own flesh and blood.
People often adopt somewhere else because they cannot pass the scrutiny that comes with adoption here.
1. So should we screen parents who wish to adopt abroad?
2. Should all adoptive parents be required to get their children a primary physician that will do physicals twice a year on set dates to determine if any abuse is going on? Afterwards social services can contact the physician to determine if any physical abuse is going on.
Do you think this will lessen the chances of physical abuse?