8NewsNow has the story.
Sounds like dude was targeting SHOT Show attendees, in part. Good work by Metro.
A couple of quick things.
Yes, theft is always the fault of the thief, but you can make it harder for them. Too many guns are stolen out of cars because people don't secure them, don't lock the doors, and assume criminals won't break the window. Even if you car is boring, someone might rifle through it.
Lock it up or take it with you. And frankly, part of this is the fault of the casinos who discourage people from carrying or bringing guns up to their rooms.