holding him until police arrived. mies stopped the gunman just inside the front door. greiling says what makes this so surprising isn t just the action, but who took it. greiling played intramural volleyball with mies. he describes mies as a smaller guy on the team, a bookworm. it turns out somebody you would totally not expect to do it. it s the coolest thing. it really is, you know. as bad as this was yesterday, it could have been multiple of times worse, exponentially worse. every single person that was in that building had a potential to be bed ridden right now. reporter: including you. absolutely. reporter: 19-year-old paul lee didn t make it. he died of his injuries. three of his classmates were hurt. another college campus dealing with the loss of young life, the