On July 16, 2018; MGM Resorts International, owner of the Mandalay Bay Casino & Hotel, filed federal lawsuits against more than 1,000 Las Vegas mass shooting victims in an effort to avoid liability in legal actions related to the gunman who opened fire on an outdoor concert from his Mandalay Bay suite on Oct. 1, 2017, killing 58 concertgoers and injuring hundreds of others.

https://www.securitymagazine.com/articles/89252-las-vegas-lawsuit-raises-security-liability-questions