There aren't many cases of armed residents stepping in a mass shooting or active shooter incidents. Not even when they legally own weapons. The cause is that active shootings happen in crowded areas, and it takes too long for people to respond. However, the press picked up a few compelling examples, such as a father who used his concealed gun to stop a mass shooting in a McDonald's in Alabama or another who used his gun to stop a racist shooter outside a Kentucky Kroger.