Twin Falls shooting leaves four dead and seven injured as investigators search for a motive

Four people died and seven others were injured in a Saturday, August 1, 2026, shooting at a newly opened In-N-Out Burger in Twin Falls, according to Twin Falls police. Authorities identified 24-year-old Chad Williams as the suspected gunman and said he died from a self-inflicted gunshot wound.

As of the latest available update, reported Sunday, two injured people had been treated at a hospital and released, three were listed in stable condition and two remained in critical condition. Those conditions may have changed since the update.

What police have confirmed

Twin Falls Police Chief Matthew Hicks said detectives were confident Williams acted alone. That is an investigative conclusion, not a court finding. Police had not announced a public motive as of the latest reporting.

The shooting occurred around 2 p.m. at the restaurant, which had opened about a week earlier as part of In-N-Out’s expansion into Idaho. An employee was among those killed, the company’s owner, Lynsi Snyder, said in a statement.

The total death count is four, including Williams. Seven other people were injured.

How the attack ended

Hicks said an off-duty state trooper and an armed civilian fired at Williams and diverted him from the restaurant. Police had not released their names. Authorities also had not released the victims’ names through the department’s official public-information channels.

That account describes the intervention reported by police but does not provide a complete reconstruction of everything that happened inside or outside the restaurant. Investigators were continuing to interview witnesses and collect evidence.

Investigators still seeking a motive

Detectives were interviewing witnesses and asking people with relevant information, images or video to contact investigators. The FBI also encouraged the public to submit photographs and video connected to the shooting.

Police warned residents not to rely on unverified social-media claims. Hicks said misinformation had falsely identified another person as the shooter and that the person had no involvement in the incident. The department did not identify that person, and repeating the name could further spread the false claim.

What happens next

Investigators were continuing witness interviews, evidence collection and work to determine Williams’ motive. Police said Williams’ family was cooperating with the investigation.

A vigil was planned for Tuesday evening, August 4, at Twin Falls City Park, according to Twin Falls spokesperson Josh Palmer, as reported by The Associated Press. Because the available report described it as planned, residents should confirm the event’s status and any changes through Twin Falls officials before attending.

For verified updates, residents should use the Twin Falls Police Department’s official information channels rather than unconfirmed social-media posts. The department’s public-information office handles media requests concerning active investigations and incidents.

Sources

• Associated Press motive investigation update
• Twin Falls Police Department