I've seen a lot of confusion about the numbers in the Clackamas (Portland suburb) mall shooting if that's the other one you're referring to. Not sure if it would be considered "mass" even though it was done in a food court, as it was 2 dead besides the gunman, with a third in serious condition but expected to recover. Not negating the significance of it at all or anything, but the shooter stole the gun from someone who was licensed to have it, so that's another issue to address entirely.