I.B. Original comment made perfect sense you would think that in 2016 a store with firearms would lock up its valuables behind more than cheap glass.  

They might as well have left cash on the counter.  I mean logically speaking would you leave cash or jewelry behind easy to break glass overnight?  Simple easy answer is no.  I can't even say common sense since obviously you don't understand that terminology so how about employing good sense and defense tactics to ensure that firearms are safe.  

Why do you think the ATF is involved?  This isn't a "regular" theft.  This is a federal case now.