A gunman killed three people and wounded seven at an In-N-Out in Twin Falls, Idaho, before an armed bystander cornered him — bad news marred by tragedy, but a case gun-rights supporters are holding up as a win.

• A 24-year-old man opened fire with a rifle near the drive-thru of a packed In-N-Out on Saturday afternoon, killing three, including a restaurant employee.
• An armed civilian, 35-year-old Jordan Salinas, drew a handgun and returned fire, forcing the shooter to retreat behind the building.
• Pinned down and unable to reach the long line of cars, the gunman shot and killed himself before police arrived.
• Supporters point to Idaho's high rate of armed citizens and low violent-crime ranking as proof that armed bystanders save lives.

Outlook: Attention now turns to the shooter's motive and the country's mental health problems, while gun-rights voices push the story of the civilian who intervened.