If this was a Tea Party gathering in South Carolina or a Republican town hall meeting in Florida, this would have had a different ending, for sure.
A responsible carrying citizen would NOT want to draw until they totally understand the situation. Otherwise, another person might misinterpret and think YOU are involved in the shooting and drop YOU.
I just hope that when I am in such a situation, my automatic response will be to move forward and help, not crouch in fear. My only experiences have been in controlled teaching environments, not in critical live fire.
.45acp, .40 S&W, 9mm, .38 Spl, .380 acp, 22lr
12 gauge, .223/5.56x45mm, 30-30 Winchester
2 Chron. 7:14 Christians must seek His face