Wow thats pretty bad!
Years ago back when I did a little deer hunting I had an old GMC pickup with one of the old gun racks in the back window. You all remember them right? Well anyway, I was coming back from Deer hunting and stoped at the local grocery store to pick up a loaf of bread per my wifes request. I Locked the truck and was in the store about 5 minutes. Came out and my right side window was busted and my 270 Remington BDL was gone............ I know it was foolish to leave the gun in plain sight but I live in a rural area and crime isnt too bad, but they got me that day.. My grandfather had given me that gun as a graduation present.

Again sorry for your loss..