Saw this in the BBC today:
Armed female bystander kills man firing at party in West Virginia
https://www.bbc.com/news/world-us-canada-61615236
Wednesday evening, a graduation party going on in an apartment complex; guy gets warned to slow down when driving through - kids, other pedestrians present. He comes back later with an AR-15 & starts shooting in the direction of the partygoers; a woman lawfully carrying shoots & kills him before he hits anyone.
It soon came out that the decedent was a career bad guy, well known to local law enforcement.
Mass shooting forestalled
1"...no religious Test shall ever be required as a Qualification to any Office or public Trust under the United States." ― Article VI, United States Constitution