Read more on this subject: Unintended Consequences
News Story Source: http://www.alloutdoor.com, billj
In it, a father and son are being held up by multiple robbers. The father is carrying, and when one of the robbers isn't looking he draws, points, then yanks the gun off center-line while trying to rack the slide to chamber a round. The robber shoots him first, and the guy dies on the floor still trying to get a round chambered. Apparently his son was shot, too.
It's impossible to know which way things could have or should have gone, but it's a pretty safe bet in this case that the fact that this guy was carrying without a round chambered got him killed. I'm not just talking about the shot he was never able to get off, or the fact that racking the slide had the effect of pulling his gun off-target after it was already on-target.