The guy with the biggest, err, the guy with alot of courage, was definitely the unarmed security guard to be honest. I tell you, I don't consider myself one who backs down from doing the right thing, but going to the door of a madman with a fully automatic weapon with nothing but a Billy Club!??! That guy deserves a medal, and is probably not the kind of guy I would want to cross.
Just imagine if one had to walk down the hallway to his door...those long intense seconds as you came closer to the dooway not knowing if he would pop out and shoot you from 20 feet out. That's serious courage, and he took a bullet for this bravery.
Not taking anything away from the SWAT team at all, they went forward as they had to. To me though, this security guard is the biggest hero of the night and it was after his approach to his door that the gunfire stopped as the coward knew his time was coming to an end.