Just recently, in Early Texas, armed citizen Vic Stacy shot and stopped a deranged man who had just murdered two neighbors and was firing at police with a rifle. Stacy made a very long shot with his revolver, three times as far as the perpetrator was from the police officer, who had an AR-15 type rifle. There are several documented cases where armed citizens have stopped mass attacks by gunmen. Let me list a few: The Pearl, Mississippi school shooting was stopped by the vice principal Joel Myrick with a Colt .45, The Appalachian School shooting was stopped by two students with handguns. Both of the above incidents were stopped by the armed citizens threatening the shooter without firing. The mass church shooting in Colorado Springs was stopped by the shooter being shot by a church member with a CCW permit.