Las Vegas Shooting Lawsuits: Hundreds of Victims Say Hotel, Concert Promoter Didn't Train Workers for Emergency

The hotel where the Las Vegas gunman carried out his attack and the concert he targeted were not prepared for an attack and had not trained their employees properly, alleges a massive lawsuit filed Monday by 450 victims of the shooting.

The suit is the largest filed in the nearly two months since the attack. It was filed along with four others, two wrongful death cases and two for victims who were severely injured in the attack. The shooting left 58 dead and more than 500 others injured—the deadliest in recent U.S. history.

The lawsuits target the hotel where gunman Stephen Paddock carried out his attack, the promoter of the Route 91 Harvest festival he shot at, Paddock's estimated $5 million estate and a firm that provided security for the concert.

The security procedures at MGM Resorts, which owns the Mandalay Bay Resort and Casino, have remained a secret, prompting questions in the aftermath of the attack after CBS reported that Paddock used a service elevator to sneak up an arsenal full of guns to his room in the hotel over several days.

He also hid his plans by simply posting a "do not disturb" sign on his hotel door for days as he meticulously prepared—posting cameras outside his room to catch when law enforcement was coming, breaking two windows so he had a clear shot from his 32nd-floor room and even blocking one door near an emergency staircase in hopes of slowing down first responders.

The lawsuits question why the hotel wasn't able to stop Paddock and say it instead "contributed" to the events leading up to the attack. The suit says the hotel was "grossly negligent in the selection, hiring and training" of employees and alleges that it wasn't doing its due diligence to surveil people coming and going from the property.

The suits also say the hotel took too long to respond and act on the threat from Paddock's room after the first "shots fired" call was made by security guard Jesus Campos, and they failed to prevent and take notice of Paddock's extensive preparations.

The hotel failed to "employ adequate safety measures" and ignored that Paddock had a "do not disturb" sign on his door for several days, the suit claims, arguing it was the hotel's duty to keep both guests and employees safe.

The lawsuit also targets the concert, promoter Live Nation, security for the concert provided by CSC and MGM, which owns the property where the festival was held.

It alleges they failed "to design, build, provide and mark adequate exits in case of emergency" and to "properly train and supervise employees in an appropriate plan of action in case of a foreseeable event, such as a terrorist attack or other emergency."

MGM Resorts International released a statement after the lawsuit was filed, explaining they are constantly updating their security, especially in the aftermath of the attack.

"The incident that took place on October 1st was a terrible tragedy perpetrated by an evil man," the statement reads. "These kinds of lawsuits are not unexpected and we intend to defend ourselves against them. That said, out of respect for the victims, we will give our response through the appropriate legal channels."

Survivors of the attack have described how difficult it was to get out of the concert grounds when the shooting started, explaining that the metal barriers acted like a maze as bullets rained down on them.

Photos from the attack show some concertgoers hid behind the slated barriers, not knowing that the bullets were coming from above—32 floors up, where Paddock was perched from a window, holed up in his hotel room.

Authorities are still investigating the shooting and hoping to find out exactly why Paddock carried out the massacre. Investigators have been able to figure out he was depressed and had lost a significant amount of his wealth but still aren't sure what triggered him to attack or why he chose October 1 for his rampage.