Many of the survivors and families of the victims of the Pulse nightclub massacre are suing the Omar Mateen's wife and his employer, claiming that they could have stopped the shooter from carrying out his attack but didn't.

The lawsuit claims "wrongful death, negligence and other counts." It was filed Wednesday, March 22, in a South Florida federal court on behalf of "almost five dozen of the survivors and family members of those killed at Pulse nightclub last June" reports ABC News.

Personal injury attorney Antonio Romanucci claims G4S, Mateen's employer, was aware he was mentally unstable but was still allowed to carry a firearm while on duty as a security guard.

“Mateen gave out so many warnings that someone should have reined this guy in,” Romanucci told The Associated Press. “They should have said, ‘You are not stable. You shouldn’t have a weapon.'”

Survivors of the worst mass shooting in modern American history are speaking out and asking questions about why Mateen wasn't stopped.

“We all deserve to know why Mateen’s threats were met with silence,” said Juan Jose Cufino Rodriguez, a survivor who now must use a wheelchair because of the injuries he suffered from the attack.

Mateen's wife is also named in the lawsuit because she failed to warn the authorities about her husband's plans, becoming an accomplice.

Unlike the families of the victims of the Sandy Hook shooting who sued the gun manufacturer, the Pulse families are going after Mateen's employer, so they "won't have the obstacle of federal law," according to Sachin Pandya, a law professor at the University of Connecticut.

But they "still have to show that what the employer failed to do caused the mass shooting,” Pandya warned.

“This will be a very challenging lawsuit,” said UCLA law professor Adam Winkler. “Victims of gun violence are looking for second-best options and that is what this is.”

This is not the first lawsuit filed by the families of Pulse victims. Last year three of the families of the victims sued Facebook, Twitter and Google for "not blocking ISIS-related content."

h/t: LGBTQ Nation