Whenever a criminal breaks the law using an illegally acquired gun, left wing hacks like Shannon Watts always blame the NRA. You see the NRA stands in the way of passing that magic gun law that will finally be obeyed by people who have no regard for any other laws.
Interesting fact: the article she links to says nothing about how he illegally acquired the gun.
The 28 year old Brinsley had been arrested 19 times. He habitually engaged in the criminal use of firearms. Maybe the question shouldn’t be “How did he get a gun?” but rather “Why was he not already in jail for breaking gun laws?”