The second case in the first link there was a trial and verdict finding liability for the seller (note there was evidence the gun shop employees had suspicions

The second case in the first link there was a trial and verdict finding liability for the seller (note there was evidence the gun shop employees had suspicions the buyer was illegally buying the gun/ammo for someone else, they sold it anyway, and the gun/ammo was bought for someone else who used the same to kill 2 police). Again one must Keep in mind <10% of cases go to trial and verdict, so the result speaks for itself, but you are right. In general there aren’t a ton of cases against merchants alleging they sold an item they knew would be used in a crime - it should be a surprise most criminals don’t announce their intent when making purchases - and gun/ammo cases are about as prolific as any for these claims (hence why I keep using that hypothetical). A prime example is The 2nd article Walmart where they settled that case, so we will never know, but if Walmart settles it’s safe to say there were facts suggesting Walmart liability meaning in that case they knew or should have known they were selling ammo that would be used in a crime. I’d place my money on SF settling this case in the same fashion, not to say they would be found liable at trial, it just seems with the available facts there is potential liability and these facts won’t play well to a jury.