About the only further restriction that can be placed on gun sales is placing those who have diagnosed mental issues of a social-disconnect nature, specifically Aspergers, on a gun purchase no-fly list until they attain a certain age, for instance, 45. Yes it’s a violation of rights and therein lies a conflict, but there are other categories of people who are precluded from owning weapons so it’s not setting a precident.
We need to address the causal agent of the problem, not the fallout of the problem that, in this case, parents and therapists were well aware of but who’s choices were arbitrary and ultimately, wrong. Let’s put some channels in place enabling a judge to be sucked into crisis situations right away if there’s an out of control pre- or post-teen and let’s nip mental illness in the bud before the worst case scenario happens.
He wasn't diagnosed with Asperger's either.
Most (if not all) of the Asperger's diagnoses in these situations have been done post-mortem. That is not a valid method of diagnosis.
I would be very hesitant to get carried away calling for a broadening of limitations on 2nd amendment rights. Most all of us have issues at some point. Today, seize the guns from people with Asperger's: Tomorrow, maybe it's your guns being taken.