"State law allows a person with a valid concealed carry permit or endorsement, lawfully carrying a firearm in a concealed manner, to briefly and openly display the firearm to the ordinary sight of another person, but the permittee is prohibited from intentionally displaying the gun in an angry or threatening manner that is not in necessary self-defense. Mo. Rev. Stat. § 571.037."
It seems like the question is whether or not their display of firearms was "in necessary self defense". Based on what has happened around the country in the last few weeks it seems like a tough case for the prosecutors to make.
As clearly seen on Tucker’s show last night, “brandishing” a weapon just outside their front door was the only thing that kept the mob from charging their residence, a restored mansion. That the mob was so close to them, clearly they were on the owners property and if they were not showing being armed, would have been attacked.