The Sandy Hook shooting was committed with guns purchased by a rich white woman, shooters mother, who would have passed any gun requirement test.
The daily Chicago shootings are from a state that had some of the strictest gun laws in the US. But they are street level shootings where black-market guns will always be available regardless of the law.
Below is the current ATF form which is filled out, called into the FBI before a gun is legally sold by any dealer. What more could you add to it ?????
.