lol, from northern south America through central America the criminal organizations have gone from town to town,city by city and set up their organizations by doing the genealogies of every city and local government official. Then they told them who their parents were,where their children went to school and where absolutely everyone in their family lived and worked.
It's that simple they go after the organized government(or anyone they need) and put them in a spot where they cant do anything other than what they are told to do or else. They know they cannot protect everyone in their family all of the time and so they know that the officials will fold and obey. This has worked for them from one nation to the next,year after year and there's no logical reason for them to change their tactics when it has worked so well in the past.
The wall will only keep those fleeing this out, not those in the criminal organizations,,they will enter legally and live in mansions. And eventually you will realize that those who are involved in this are those that were forced to participate(unwilling) and that the ones who were trying to become a part of it stood out to them as as potential trouble because you see no one wants to,,,they do because they have no choice.