Did you read the article? "in the 18 years before the law, Australia suffered 13 mass shootings - but not one in the 14 years after the law took full effect."

Did you read the article? "in the 18 years before the law, Australia suffered 13 mass shootings - but not one in the 14 years after the law took full effect." The laws were introduced as a direct result of the massacre you're referring to.