Here's an interesting story - someone started shooting at people in a shopping centre in Alabama, and several "good people with guns" drew their legally-held guns in response.
The police turned up and one police officer mistook one of the "good people with guns" for the initial shooter and shot the good guy dead.
This sorry situation would appear to support those who claim that when there is a shooting,"good people with guns" are more likely to make the situation more confusing rather than help stop the initial shooter.
What do posters think of this situation?
Alabama mall Thanksgiving shooting suspect arrested - BBC News
"Police originally believed they had shot and killed the gunman at the scene of the Thanksgiving attack at the Riverchase Galleria mall in Hoover.
However, they later admitted wrongly killing Emantic Bradford Jr, 21.
Mr Bradford had "heightened the sense of threat" at the scene by drawing his gun after shots rang out, police said."