Very interesting. But if 80% of crime guns have been purchased legally, that means 20% have not. On the other hand, since we have a background check system, that implies that there is a black market for firearms and that the background check system is being evaded. Interesting that drug and alcohol abuse are better predictors of violent crime than mental illness. They note that Britain and Australia have virtually banned guns, but there was just a story in the news about a multiple shooting incident near Sydney, Australia. Apparently a "business dispute" between bikers. I guess these guys didn't hear about the gun ban.
"Detective Inspector Mark Brett said at a press conference that when they arrived, they found "three males, one deceased and two others with gunshot wounds.""
https://news.vice.com/article/two-dead- ... hour-stand