with a gun...

The suspects then fled on foot to a nearby Wal-Mart, where Jerad
Miller fired a single shot upon entering, police said. A patron at the
store who carried a firearm confronted Jerad Miller, not realizing
that he was accompanied by Amanda Miller, who shot and killed the man,
police said. He was identified as 31-year-old Joseph Wilcox of Las
Vegas.

Let's see, how many people did he save, including himself?