You have to ask yourself what happpened with that and if they did, why didn’t the theatre security respond?
Not all business establishments have their own security guards, nor should they be required to. Furthermore, security guards in businesses aren’t allowed to be armed in a lot of states.
The victims’ families are entitled to these answers and they no doubt will get them … in one way or another…
The only people who should answer to anyone are the criminal himself, and maybe the university, his family, and the gun dealer. The theatre was the victim here, not an involved party.