Chad Williams walked into the Twin Falls In-N-Out on Saturday afternoon carrying a rifle. The 24-year-old opened fire inside the busy new restaurant and in the parking lot. Three people died. At least seven others were wounded before it was over.
Police identified him the next day. They said he acted alone. Williams died from a self-inflicted gunshot wound near the scene. An off-duty state trooper and a civilian returned fire. Officials said those shots pushed him away from the building and likely saved lives.


One of the people killed was Ashley Garibay, a 23-year-old employee from Stockton, California. She was working when the shooting started. Family members named her publicly and shared photos. In-N-Out owner Lynsi Snyder confirmed a female worker had died. Snyder called the killer someone who did not value other lives or his own.
The restaurant had opened only about a week earlier. Crowds were still coming in to try it. Witnesses described people running, screaming, and dragging the wounded across the asphalt. Officers evacuated nearby businesses and treated the area like an active threat zone.
Twin Falls police said two of the injured were released quickly. Three were stable. Two stayed critical. City officials noted the investigation into why Williams did it was still open. His family cooperated with detectives.
The FBI stepped in to help. Tip lines went up. Local leaders asked people not to spread unverified names or stories online. The scene stayed locked down while evidence teams worked through the night.
By Monday the facts were still sparse. Williams had no known connection to the victims that police would share. The community around Blue Lakes Boulevard kept asking the same question: what set him off that afternoon.
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