He likely didn't. We know he propped open an exit door and went to his car parked behind the theater, where he had access to all he brought.
He's responsible for what he did; but some responsibility here is corporate.
What I mean by that is even from a sheer economic situation only (potential freeloaders) -- never mind security -- theaters SHOULD HAVE automatic alarms going to their security people any time a door is propped open a given length of time...and more attention should be given to that early in the movie (again, just from an economic angle).
AMC will be hit up big time re: lawsuits from victims' families for this ONE thing!
Good observation. When he went out the emergency exit from the theater to get his weapons, that door should have been alarmed.
RE: AMC will be hit up big time re: lawsuits from victims’ families for this ONE thing
I don’t see how. Or how anything but a navy seal could have stopped it