A pair of California residents have filed a class action lawsuit against promoter Live Nation Entertainment in Orange County, asking that they and all others who purchased tickets to the Route 91 Festival in Las Vegas last fall receive full refunds. Over 22,000 people bought tickets to the festival, which saw a gunman open fire on the crowd, killing 58 and injuring hundreds in the deadliest mass shooting committed by a single individual in U.S. history.

“It’s hard to believe that it’s almost March 2018 and only a portion of those who purchased tickets to the October concert, which ended in massacre, have had their money refunded,” attorney Mark Robinson said.

The lawsuit is not the first to be brought against Live Nation in the wake of the tragedy. A negligence lawsuit filed in California in October of last year named the promoter, as well as Mandalay Bay, MGM Resorts, and the estate of the shooter as defendants. This new suit was filed on behalf of Kevin and Laura Thompson, who reportedly paid $531.21 for two tickets to see the concert. It was on the concert’s final night, as Jason Aldean performed, that the shooter opened fire.

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While some who attended the concert have already requested and received refunds, the promoter has not issued refunds to all who attended, which is what the lawsuit is requesting.

“It didn’t matter if they were family members of deceased, gunshot victims or traumatized because of the shooting and their escape,” lawyer Craig Eiland, who represents several victims, said in a statement. “The only factor was that those that heard about a refund through Facebook or friends and demanded a refund, got it. So we decided to make one demand on behalf of everyone.”

The lawsuit also accuses the promoters of failing to provide adequate safety and security protections, charges similar to those brought in the October lawsuit.