One that would have prevented him from getting his hands on a firearm.
If he’s a felon, he shouldn’t have been able to possess a gun. Did someone sell him a gun? Did someone let him borrow their gun? Did he steal it from someone who didn’t store it securely in a gun safe?
Write the laws so that the person responsible for the felon having a gun can be convicted of murder for the people killed with that gun. Make the liability for owning and selling guns so strict that you would have to be an idiot not to take every precaution to protect yourself from fault.
Because this won’t stop unless something changes, and we can’t just sit on our hands and pretend it was nobody’s fault every time it happens. If we’re going to make laws forbidding felons from owning guns, we better start treating anyone who enables felon to have a gun as accomplices in any crimes committed with the gun, without exception. No protections for guns stores or private sellers, just actual enforcement of laws prohibiting felons from possessing firearms.
What the fuck?