They have the choice to move home where they belong. They chose to break a laundry list of laws out of self interest. Why should anyone - especially the state - be interested in assisting them?
It's a short drive to the border. They can even take their cars with them; Mexican registration is a joke. Hell, they can just tell the Federal Judicial Police that they stole it in Los Angeles - that ought to get a few congratulatory backslaps.