An infamous thief, when asked why he robbed banks said, "cuz that's where the money is." My point is why rob a pawn shop--I know they keep sometimes large sums of cash on hand, but if they sell guns, everyone behind the counter is packing a sidearm. If this particular perpetrator survived--he was lucky.
As an aside, in Texas, the recently enacted "Castle Doctrine" actually allows a homeowner or any resident to now stand up to those who break into their homes. They are authorized to protect themselves, their families and their possessions with lethal force if needed. This, in contrast to previous law that said the resident must flee and hide in their own home away from any assailant. Thank God, Texas now realizes that a man must have the right to stand up to criminals and protect themselves inside their own homes.