“Yet the perpetrator, who was killed by a police officer at the scene, had been licensed as an armed security guard, which means he passed a background check and was legally allowed to own firearms.
In that respect, the killer was typical of people who commit crimes like this. That is the main reason why expanded background checks cannot reasonably be expected to have much of an impact on mass shootings, contrary to the impression left by politicians who reflexively recommend that solution.
Federal law disqualifies broad categories of Americans from owning firearms, including people who have been convicted of felonies or subjected to court-ordered psychiatric treatment. Background checks are required for all gun sales by federally licensed dealers, and some states extend that requirement to transfers by private sellers.
As several news outlets noted after the Allen attack, Texas is not one of those states. But that detail does not seem relevant in this case: Although the killer bought some guns from private sellers, CNN reported, the rifle he used in the attack was “purchased legally,” meaning he was not a “prohibited person” under federal law.”