If any crewmembers had been injured I am 90% certain it would be public news already.
Why? Because whenever a lawyer gets such a case he is hoping to find more just like it, so he puts out a news item about it. Next, the media would LOVE such a scandal to be connected with this event, and they would surely report it.
So - I doubt that it happened.
BTW: it was a little odd to assume that Ron was saying he "hoped" that some of the crew was injured, all he said was "IF" some of the crew were injured that he hoped they have representation, and I am sure they would (if there had been any - but as far as we know there were no injuries).