Joseph Robert Wilcox, 31, was killed on Sunday morning, June 8, 2014, inside a Las Vegas Walmart after confronting an active shooter. A married couple, Jerad and Amanda Miller, had entered the store following the ambush killings of two police officers at a nearby pizza restaurant. Jerad Miller fired a shot inside the Walmart, and Wilcox, who was legally carrying a concealed firearm, drew his weapon and moved to engage him.

While Wilcox concentrated on Jerad Miller, Amanda Miller—also armed and involved in the attack—approached from behind and fatally shot Wilcox. Responding officers cornered the Millers; during the ensuing gunfight police fatally shot Jerad Miller, and Amanda Miller died of a self-inflicted gunshot wound after being wounded. No arrests were made because both suspects died at the scene. Wilcox has been described as having delayed the attackers and allowing other shoppers to escape.

Did anyone in the store know Joseph Wilcox personally or see what happened as Wilcox moved to confront the shooters?