Not for UAL and the City of Chicago. As for the 3 officers, it might be a good idea to hire the best criminal defense attorneys they can find.
If the thugs have a good union, their story would be that the airline personnel told them that a passenger was being disruptive and was a threat to other passengers and crew, and that they were trying to mitigate the threat that they'd be told of.
That would create enough FUD that the jury might just pile on the airline.
The union will hire lawyers for them