What's an "undocumented" immigrant?
Anybody who lives in LA knows of the MS13 gang - which is made up almost entirely of illegals from Mexico and Central America. The local cops could arrest them all for simply being here illegally but even when they are deported the illegals end back up in LA.
I'm for building a prison in Mexico and letting the Mexicans run it cheap. We can round up all of the illegals and put them in prison IN Mexico for a lot less and get the violence criminal ones out of state systems and out of circulation in another country. Longer sentences will prevent them from illegally re-migrating back to LA.