Welcome to the board Looney.
As to the situation there is a saying around here; 'Any time, anywhere, anybody'
Just because something has not occurred before at some location, time or as to some person...Should not be taken to mean it can't and/or will never occur.
Criminals are opportunists.
By the look of the location at that business it appears to be located directly off of a highway/rural route.
Anyone could have committed this crime as for any reason be they from your community or a 'stranger' who just happened to be driving through. Exact same condition as crime occurs anywhere else in America, and has been for centuries. As contrary to popular belief and portrayal.
Hopefully your local law enforcement will crack the case and bring the criminal(s) to justice.
But that is of little consolation to the two persons murdered and who cannot be brought back to life.
This is why I personally carry as _on body_ and not just when planning to drive to/through the 'bad part of town' or to leave it in my car thinking erroneously that BGs will allow me time and means to go retrieve it, just before they choose to attack me.
As well I personally am a big fan of business owners such as this case where the public is allowed to enter and be on site to carry again as on body.
Even if they had a firearmin the office or some other place kept on site, what good is that when being run up on in the immediate as outside and/or behind the building far from reach to the firearm, a phone or anything else of real use.
On body carry FTW.
Everywhere all the time. Period.
Doing so is a highly effective way to preserve and even save ones own life.