Making a false statement to an LEO is a crime in and of itself. So on top of being potentially susceptible for hunting without a license, your friend is now also facing possible arrest for making a false statement. At a guess, I would conjecture that if the game warden gets a burr under his saddle he could also toss in obstructing justice, hampering an investigation, interfering with an officer, and probably a half dozen or so other "add-on" type charges that are there mostly for people just like your friend.
Your friend isn't very intelligent, is he? IMHO it takes a special kind of genius to convert a single potential offense into multiple offenses.