A man killed in a mass shooting at a new In-N-Out Burger in Twin Falls, Idaho, had been anticipating visiting the recently opened restaurant due to its popularity, his sister revealed.

Christopher Claunch, 59, died from injuries sustained in the Saturday shooting, his sister Kimberly Castaneda told The New York Times. Claunch, who had lived in Idaho for 30 years and worked at the Renaissance Ranch Recovery Center, often visited the burger chain when he traveled to California to see Castaneda.

He was reportedly excited about the opening of the Twin Falls location, the fourth In-N-Out in Idaho, which opened on July 24. Claunch had mentioned to his sister that he planned to wait to visit the restaurant until the initial frenzy surrounding its opening subsided.

Castaneda described her brother as "always being a goofball," recalling a moment at a Fourth of July gathering where he wore a headband with small tin wheels on it without apparent concern. Claunch had been sober for two years following a struggle with alcoholism. He also experienced the loss of his first wife shortly after they were married.

Law enforcement has not yet formally identified all victims. The other person killed in the incident was a restaurant employee. The shooter, identified as 24-year-old Chad Williams, died from a self-inflicted gunshot wound.

Seven people were injured in the attack. Among them was 62-year-old Terry Dudley, a Tesla driver who was struck by two bullets in the back while charging his car. A friend described Dudley, a widower and father of four, as a selfless individual who consistently prioritized others. James Palmer, a friend, stated in a fundraiser that Dudley was the "best employee I have ever had" and a man whose "value goes far beyond his work."

Steven Pixley was also shot, sharing an image of his injury from a hospital bed. His cousin, Tracey Evans, said Pixley was riding his motorcycle near the restaurant when he was hit by a bullet, becoming an unintended victim of the violence.

Witnesses reported seeing a person emerge from the drive-thru with an AR-style rifle. Another individual with a pistol then engaged the shooter, who reportedly fired several rounds. Nayeli Rodriguez, who was inside the restaurant with her daughters, heard shots from the kitchen. An employee alerted patrons to the shooting and instructed them to get down. Rodriguez recounted an older man attempting to shield her and her daughters as they fled the establishment, eventually being given a ride by strangers.

In a statement, In-N-Out CEO Lynsi Snyder stated that the employee who was killed was "taking care of our most important asset – our Customers, and her life was taken by a disgusting human who doesn’t value the lives of others or his own."