Chilling surveillance footage has revealed the terrifying sequence of events during the mass shooting at an In-N-Out restaurant in Twin Falls, Idaho, showing the gunman opening fire at the drive-thru before moving through the parking lot and surrounding area.

The footage, released by the Twin Falls Police Department, shows 24-year-old Chad Williams arriving at the restaurant in a white Honda Civic. Moments later, he is seen raising a handgun at the drive-thru payment window and shooting 23-year-old employee Ashley Garibay, who later died from her injuries.

Williams then moved toward another drive-thru window, where he fatally shot 59-year-old Christopher Claunch, who was inside a nearby vehicle.

As the shooting unfolded, former Twin Falls and Idaho State Police Officer Austin “AJ” Scott rushed toward Williams in an attempt to stop him. Williams fired at Scott, seriously wounding him. Despite his injuries, Scott managed to draw his own weapon and attempted to confront the gunman before being pulled to safety and taken to a hospital.

The surveillance video also shows employees inside the restaurant desperately trying to escape the gunfire. Several workers can be seen dropping to the floor and scrambling for cover as an off-duty Idaho State Police trooper moves through the restaurant, urging them to evacuate.

After his handgun apparently jammed, Williams returned to his vehicle, retrieved a rifle and continued the attack. He fired toward vehicles waiting in the drive-thru line and later exchanged gunfire with the off-duty trooper near the restaurant.

The violence then spread beyond the restaurant. Williams fired at vehicles stopped at a nearby intersection before moving toward a Tesla charging station, where he fatally shot 66-year-old Dale Schultz and critically wounded his wife, Reinette.

As police searched the area, Williams continued moving toward a nearby hiking trail. A bystander reportedly attempted to confront him, apparently trying to give others time to escape, but Williams fired at him before continuing along the trail.

The final moments were captured on an officer’s body camera. Police spotted Williams near a riverbank and ordered him to show his hands. Instead, he died from a self-inflicted gunshot wound and fell into a nearby canyon.

The attack left three people dead and seven others wounded, according to police. Investigators have not yet established a motive for the shooting.

Authorities said the surveillance footage also highlighted the actions of employees, bystanders, officers and other civilians who risked their own safety to help victims and get others out of danger.

The investigation remains ongoing as authorities continue reviewing the circumstances surrounding the deadly rampage.