A person I know is a Texas Wildlife Ranger. He, and a bunch more, have been sent to the border. Since April the Rangers have arrested over 20 thousand children. That is not counting the ones taken in by others.
There are groups of kids on the other side of the river waiting for the Rangers to return. As soon as the Rangers come back another group swims across, climbs up the riverbank and sits down. All day long.
The Rangers figure about 2 percent have drowned.
And yet Mexico does nothing.