They claim that since they outsourced security the victims should be suing the contractor. ...Why not just say that rather than suing the victims?
Apparently this motion suing them prevents the victims from suing MGM in the future. I've been reading some legal analysis about how that this basically forces the issue to be settled right now as opposed to waiting for the hundreds of people to get together to complain about how MGM had dropped the ball.
But knowing that about the contractor being the one to mess this up. MGM probably can't tell the victims to sue the contractor because they don't want the contractor company mad at them and sour a business relationship.
Capitalism is pretty messy like that.