That could be examined. How many licensed concealed carriers perpetrate wrongful shootings per year? This would give
us a probability of x shootings per person per year. Multiply x by the number of licensed concealed carriers in the school.
I couldn't find the numbers, but in MI it's about zero.
These are the only stats I could find.. from a pro-gun blog quoting the stats of a anti-gun site. I could not find the original stats quoted on the anti-gun site.
"The opponents rely on a litany of horribles. The Violence Policy Center in Washington claims that since May 2007, individuals licensed to carry guns killed 286 private citizens and 11 law enforcement officers and committed 18 mass shootings. This gory record, it asserts, destroys the myth that permit holders are generally law-abiding folks who behave responsibly.
In fact, VPC's own data, when inspected closely, doesn't dent the case for gun rights. Over the past four years, there have been more than 60,000 homicides in the United States. The slayings carried out by permit holders amount to fewer than one of every 200 murders. For every licensee who killed someone, there are more than 20,000 who didn't."
I'm just going to assume "since May 2007" is to early 2011, since that is when it was written. So less than three full years, 297 murders carried out by those who had a license. 100 a year. 18 of the situations involved mass shootings.. 18/3 equals 6 mass shootings per year from permit carriers.
120 dead due to school shootings since 2007, including 2012. 24 per year. Number of deaths homicide firearm 11,493... 2009.
Chances you will be shot at school as a kid, during hours, as opposed to anyone else who is being shot: 1/5th of a percent. On the otherhand, you have 1/2th of a percent chance that the person shooting has a concealed carry license (assuming the reason article quoted above was correct in stating that 1/200 homicides are done by carriers.).
It's 2.5 times more likely someone with a concealed carry license will murder you than it is anyone at all will kill a child at school, including other children in the school.
Let's just assumed there was one extra person per public school, 98,817 at the end 2010. I have .005% chance that a murder that will take place by someone with a concealed carry weapon.
As is stated in the first Reason article (pro-gun) For every 1 concealed weapon killer, there are (over) 20,000 that don't kill. I don't know the actual number because I can't find the stats, but let's just assume it's 22,000.
98,817 public schools. If one concealed weapon carrier was at a school, than we should expect that 4.49 of them will use the gun at the school in a given year.
So are we going to stop 4 1/2 killers per year with the policy? It would have to be that effective at least just to undo the added likelihood that someone with the gun will shoot. 2012 only had 3 school killers. The most schools involved in a single year is 8. In 2012, it was likely that it would not even been possible for a policy to be effective.
The Unconcealed Truth About Carrying Guns - Reason.com
Sandy Hook: A chart of all 137 fatal school shootings since 1980. - Slate Magazine
FASTSTATS - Homicide
Number of U.S. Public Schools — Infoplease.com
But let's take your claim & apply it to armed guards. Is the school where Obama's kids go (Sidwell) made more dangerous
by the dozen or so armed guards (private citizens) there?
The problem with armed trained officers at every school would be the creation of 40 hours per week per school (some of which would be overtime for cops).
This would be an excellent argument against surgery too.
Despite the best intentions of the surgeon, it could go wrong.
(How's that for reduction ad absurdicalistic?)
That would be an apt argument, if it didn't sort of imply weird stuff. For example, surgery is usually done to people who are usually already suffering some ailment, and they have agreed to any possible bad outcomes. This is different from kids in a school, who aren't actually in need of a protectorate 99.9 percent of the time. There is little consequence to not doing anything in this situation. There is much consequence to not doing a surgery that is needed.