It doesn't surprise me that the shooting was at Lowes. These stores have the most ignorant, incompetent and indifferent employees of any major home improvement chain I have ever seen. They make up for what they don't know with a blank stare or rude rebuke. Not that this justifies shooting, it doesn't. But the management of Lowes is one of the best examples of how not to run a store that deals with the construction trade. As a contractor, I only send my people there as a last resort.
I've never been in a Lowes' but that's been my experience at the local Home Depot.