This fucker will burn in hell.
We're not supposed to talk about specifics online, because it's an ongoing investigation, blah blah blah. But it was not a "fight," and the park is only falling back on the "contractors" label for PR spin--many if not a majority of their employees are technically contractors.
Just know that if that fucker had been able to sneak a gun into the park, a bunch of people would be dead, including children and families. And the guy in critical condition is not nobody.