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Gun-free zones have been the most popular response to previous mass killings. But many law-enforcement officials say they are actually counterproductive. “Guns are already banned in schools. That is why the shootings happen in schools. A school is a 'helpless-victim zone,'” says Richard Mack, a former Arizona sheriff. “Preventing any adult at a school from having access to a firearm eliminates any chance the killer can be stopped in time to prevent a rampage,” Jim Kouri, the public-information officer of the National Association of Chiefs of Police, told me earlier this year at the time of the Aurora, Colo. Batman-movie shooting. Indeed, there have been many instances — from the high-school shooting by Luke Woodham in Mississippi, to the New Life Church shooting in Colorado Springs, Colo. — where a killer has been stopped after someone got a gun from a parked car or elsewhere and confronted the shooter.
Economists John Lott and William Landes conducted a groundbreaking study in 1999, and found that a common theme of mass shootings is that they occur in places where guns are banned and killers know everyone will be unarmed, such as shopping malls and schools.
I spoke with Lott after the Newtown shooting, and he confirmed that nothing has changed to alter his findings. He noted that the Aurora shooter, who killed twelve people earlier this year, had a choice of seven movie theaters that were showing the Batman movie he was obsessed with. All were within a 20-minute drive of his home. The Cinemark Theater the killer ultimately chose wasn't the closest, but it was the only one that posted signs saying it banned concealed handguns carried by law-abiding individuals. All of the other theaters allowed the approximately 4 percent of Colorado adults who have a concealed-handgun permit to enter with their weapons.
“Disarming law-abiding citizens leaves them as sitting ducks,” Lott told me. “A couple hundred people were in the Cinemark Theater when the killer arrived. There is an extremely high probability that one or more of them would have had a legal concealed handgun with him if they had not been banned.”
Lott offers a final damning statistic: “With just one single exception, the attack on congresswoman Gabrielle Giffords in Tucson in 2011, every public shooting since at least 1950 in the U.S. in which more than three people have been killed has taken place where citizens are not allowed to carry guns.”
