While we’re at it, let’s make it easier to sue the government for giving the gun dealer the ok to sell it to the individual. Let’s also sue the car manufacturer of the vehicle he used to get to where he committed the crime, the brand of clothes he was wearing, the owner of the property he was located, his parents for his existence. Sounds stupid doesn’t it, because it is. If companies are held liable for the use of their products, you will see a lot of companies go out of business due to liability including car manufacturers. If a gun dealer knowingly sold a firearm to someone who did not pass the background check, then I can understand suing him and him alone.