I've been wondering about that. They way that tunnel is described, it seems possible that this guy was coming and going freely, but had to check in every now and then. He has a wife and kids in the US and a CA driver's license. You'd at least thing the license would've been revoked and the family deported. How did our gov NOT have a handle on this guy?
You ask that question like you think the government wants to do anything about this. I'm sure he was paying off all the right people, and so will have no problems with the 'authorities'. Americans have no idea how deeply corrupt our government is.