gunman who claimed to be inspired by isis. but even steve ballas, a gun shop owner, believes australia's laws are saving lives. >> no doubt. a lot of firearms have been taken out of undesirable hands. there's still a lot out there, but they're thinning them out. >> reporter: if you were in america, you'd probably sell a lot more guns and make a lot more money. >> i suppose sometimes it's not all about the money. >> there are too many guns lying around, and you lose your temper, even rational people pick up a gun and shoot somebody. it's harder if i can put it bluntly, to kill ten people with >> reporter: 85% of australians either support the gun laws or think they should be even tougher according to a recent opinion poll. what australia does not have a is powerful and wealthy gun in the u.s. >> holly williams reporting. thank you. in another important story, chicago police already under federal investigation for their