I don't know, I think that even if the first aiders didn't know about the extent of the leg injuries, they would AT LEAST expect significant whiplash injuries and you shouldn't take any risks with necks.
Ambulance should have been called immediately; this wreaks of them initially trying to get away without involving outside agencies. They knew that it was serious enough to notify the CEO, before calling the ambulance, so I don't buy that for a second.
Their initial response was awful and dangerous, and could have exacerbated the suffering of the victims (physical or mental).
Since that, they've been much better.