At the very least there needs to be a way of documenting these illegals.
We have to have some sort of official record and identification of people in the country.

I don't know if when they get caught at the border or elsewhere?
If they get finger printed & photographed before returned to their country?
In case they return again?

Who knows the best answer- it is such a complex problem.
Maybe Canada, USA & Mexico show all join together as one nation LOL