In an event of a shooting that large legal department will be first and foremost protecting the corporation.
And “some kind of insurance” is not a guarantee of anything, as it is also there to first and foremost protect the corporation.
Let’s say you have Ferguson #2 type situation, a highly politicized shooting with big mouth demagogue politicians and media declaring guilt without a trial, and angry mob threatening to burn down the stores, what are the odds that the corporation would be willing to take a very expensive and bad PR moral stand and get behind their $35 /hr lowly employee, vs that they will throw him to the wolves ?
No freaking way would I play rent-a-cop on behalf of some business, ever.