No, I have nothing especially useful to say about Sandy Hook.
Except this: Figuring out how to prevent the next gun massacre (or specifically the next gun massacre at a school) is a classic case of solving the wrong problem. (And the best solution to that wrong problem would be to minimize media coverage, in order to avoid posthumously rewarding this mass murderer with the attention he craved and thereby incentivizing the next mass murderer. But there’s no way to do that, as there might have been in the days of three TV networks, two wire services, two newsweeklies, and a handful of important daily papers.)
The right problem is gun homicide generally, or homicide generally.
Sandy Hook reminds us that we have about five times the murder rate of any other advanced country, and that most but not all of the difference is guns, and in particular concealable guns. That’s partly because a bullet wound is statistically more lethal than a knife wound (and more likely to inflict permanent serious injury even if the victim survives) and partly because a gun is the perfect wimp’s weapon, requiring no strength, skill, or physical courage and allowing both physical distance and psychological disconnect between killer and victim. (Some of the gangbangers now locked up for drive-bys turn out to be incapable of defending themselves in prison fistfights.)
But Sandy Hook is utterly atypical of our homicide problem. Massacre perpetrators don’t look much like ordinary murderers; for example, they’re virtually all white, with short (if any) criminal histories. Very few ordinary murderers get their weapons from their mothers’ gun collections.
Getting our rate of concealable-gun ownership down to European levels would prevent thousands of homicides per year. But I see no way to get there from here. Reducing our overall rate of concealable-gun ownership by 10% might or might have any measurable impact. The question is whether whether we can keep guns out of the hands of people who will use them to commit crimes. And most of those people don’t fit the profile of the Sandy Hook killer.
So asking how to prevent the next Sandy Hook doesn’t help answer the question how to reduce the rate of gunshot injury, which continues to rise even as improved medical care keeps the homicide rate moving down.