Maybe the stench of urine gave it away.
Those people are morons. Easiest way to smuggle someone is through cargo of a tractor trailer, or on a cargo ship.
Or cross into puerto rico, cuz there people are US citizens (for some unknown dumb reason), get a counterfiet DL or certificate, and then just happily fly over on US Airways from PR or Guam.
or go through an indian reservation and pay 'em 50 bucks to let you in.
Or book a flight to Canada (BC). Take a bus up to Yukon. And then snowmobile your way into alaska. And then book a flight happily on US Airways.
Those alien smugglers aren't very smart. The chinese have got it down to an artform. You rarely hear of Russian and Chinese smugglers get busted. Maybe once every few months compared to the thousands they bring in every month.
-= nav =-