I remember reading that there have been only a handfull of murderous shootings by legal concealed pistol holders in the United States over the past decade (I can't verify it because the book is back at home), which is of course one logical consequence of making it so annoying to get a permit to carry (another logical consequence is that the vast majority of murderers won't bother to get a permit to carry but will bother to carry through with their intended murder, knowing full well that if they get arrested for the murder, a charge of "illegal firearm possession" will be the least of their worries).
The Brady Campaign begs to differ: http://www.bradycampaign.org/xshare/...s-misdeeds.pdf. However, they put forth a very unconvincing argument. The number of actual shootings by permit holders between 1996 and 2009, shown in the black boxes, is 63, and many of those are from accidental discharges or by people whose licenses had expired years ago. The incidents not listed in the black boxes are almost entirely victimless "crimes," mostly carrying a firearm in a prohibited area. For example, the following is one they list from 2007:
Seattle, WA ٠ 10/23/07. A 23-year-old college student who police declined to identify was
apprehended at Seattle Central Community College after a fellow student reported him to
campus security. The man had one loaded weapon in his waistband and two more in his
backpack, along with ammunition. The man appeared “extremely nervous” and began to cry and shake uncontrollably when questioned by police. Although the college had a policy prohibiting possession of firearms on campus, the policy could not be enforced because the young man reportedly had a valid concealed carry license.
So the Brady Campaign has shown us less than 63 concrete examples of concealed carry permit holders killing someone with their weapons, either by accident or on purpose. There are approximately 30,000 gun-related deaths in the United States every year, meaning that those belligerent legal handgun carries accounted for approximately less than than [63/((2009-1996+1)*30,000)]*100% = 0.015% of all those deadly killings.
But that statistic could be wrong and it could be true that, as the Brady Campaign report says, those 63 incidents are only a "fraction of the total number of dangerous and deadly incidents involving concealed carry licensees" because "a suspect’s status as a concealed carry permit-holder is often not reported by law enforcement or the media, and also because such information is steadily becoming less available to the public due to gun lobby intimidation." (Does anyone really believe that the gun lobby is in cahoots with the government in keep concealed carry-related deaths under wraps? C'mon .... in reality the government feels threatened by private firearm possession and would jump on any chance it had to take our firearms away.)