By all accounts, Joseph Wilcox was the prototype of a “good guy with a gun.”

When a gunman took control of the Las Vegas Walmart where Wilcox was making a return on Sunday, he walked toward the danger. He was carrying a concealed handgun, perhaps believing he could save lives by taking out Jerad Miller, who had already killed two police officers and was waving shoppers out of the store at gunpoint.

Wilcox was killed when Amanda Miller, Jerad’s wife, caught him by surprise and shot him as he approached her husband, gun drawn.