We should really put rfid chips into illegal aliens so they can't use different names as easily. Not citizens or legal immigrants, just illegal aliens who are caught by border patrol or ice.

When they are caught they should have the chip injected into them with a reference number for a database that all sorts of immigration and other law enforcement can read to determine the illegal alien's true identity. If the illegal is ever caught again this would be an easy way of finding their criminal history in addition to their fingerprints. If they somehow get it out or deactivated and are caught by their prints put it back in again. They should put it in at least 2-4 places in the illegal's body to make it hard to take out or disable.

We're already doing this with dogs and cats so if they are lost without a collar a shelter or vet can identify them.

We could even put up sensors in areas with lots of illegals that would detect if any illegals are in the area. We could do the same with sexual predators if they go near a school or park too (while these could be prevented from being read by foil it's still better than nothing).