The curious part was a guy from Alaska flying to Fort Lauderdale with no luggage other than the checked gun. How do you span climate zones like that without a need for clothing of some sort? That should have raised some questions.
Takes hours, not days or weeks to make that flight.
Also the stop and connecting flight in Minneapolis. It wasn’t an overnight, but I’d be looking to see if he made contact w/anyone at the airport, or if he left the airport before his flight out.