The Twin Falls In-N-Out Shooting

The story so far

As of August 2, 2026

A mass shooting at an In-N-Out Burger in Twin Falls, Idaho has left three people dead and seven wounded, thrusting local law enforcement, the restaurant chain, and a shaken community into a high-stakes public-safety investigation. Police say a single gunman carried out the attack in and around the busy restaurant, raising fresh questions about rapid response and bystander intervention in active-shooter situations.

The violence erupted in the early afternoon at the restaurant and parking area, drawing an immediate police response. Within hours, authorities identified the shooter as 24-year-old Chad Williams and said he acted alone, while noting that an off-duty Idaho State Police trooper and an armed citizen exchanged gunfire with him during the assault. The chain’s owner later confirmed that one of her employees was among those killed.

Police now say Williams died from a self-inflicted gunshot wound after killing three people and wounding seven others. With the gunman confirmed dead and no additional suspects, the acute threat has passed and the investigation is centered on reconstructing the timeline and assessing how the confrontation unfolded.

Key details remain unsettled: investigators have not announced a motive, and they have not publicly quantified how the actions of the off-duty trooper and the armed citizen affected the casualty count. Officials have said those interventions may have reduced the toll, but their precise impact is still being evaluated.