Proof his background check would not have failed. He had a restraining order and by law would fail. We need to assume that unless you have proof. You clearly have none so your just making things up. That's pretty pathetic debating.
I have no proof that he would have and you have no proof that he wouldn't have. It's a matter of opinion based on the facts as we know them.
We know that it was two days after the order was issued that he bought a gun. We know that states have difficulty in processing the required reports to the FBI so the data can be inputted into the NCIC database and knowing that government wheels do not always run in a timely and in an efficient manner. So I think it's safe to say he had a greater chance than not at passing a background check.
But again, neither of our assumptions are relevant!
The man legally purchased a firearm??
You claim had the law required the private seller to run a background check the murder wouldn't have happened. A huge assumption on your part.
I asked you to access the NCIC database to see how easy it is to access and you have yet to tell me how well it worked for you.
Just act like your selling yourself a firearm and run a background check on yourself. It shouldn't take more than a few minutes.