Man who allegedly stabbed 5 coworkers at Thunder Valley Casino identified

The knife-wielding casino staffer who allegedly slashed five coworkers at a luxury California resort has been charged and identified by police — as his creepy mugshot was released.

Joseph Naugle, 22, faces attempted murder charges, with other charges likely forthcoming in the shocking Wednesday attack at Thunder Valley Casino Resort in Lincoln that left bloodied victims sprawled among the slot machines as paramedics tended to their injuries.

The Roseville resident was taken into custody within minutes of deputies arriving. He’s being held in a local jail.

One victim was transported to a hospital with non-life-threatening injuries, while the four others were treated at the scene by Thunder Valley emergency personnel and Cal Fire, authorities said.

None of the victim’s injuries were considered life-threatening.

“At this point in the investigation, it appears the suspect knew all five victims. No additional suspects are outstanding. And there is no outstanding threat to the public,” the Placer County Sheriff’s office said in an update on Facebook.

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Naugle, who was reportedly still dressed in his kitchen apron when arrested, allegedly carried out the gruesome attack at the Dos Coyotes Border Cafe inside the casino.

The casino referred The California Post to the sheriff’s office for comment.

Thunder Valley Casino Resort was not evacuated and remained open Wednesday night, while the restaurant was closed following the stabbing.

Naugle graduated from Roseville’s Woodcreek High School in 2022.

“We’re so proud of him,” gushed his grandmother Brenda Russo in a Facebook post celebrating the milestone.

The sheriff’s office has not shared any details on a possible motive for Naugle’s alleged attack.