How in the world could this guy get away with shooting 30 people without one of them shooting back?

firearms. Students may not have or keep any firearm on their persons, in their quarters, or in their motor vehicles at any time while on university property except with the permission of the chief security officer of the university.

3-1.5 Dangerous Weapons:
1.5a Possession, use, sale, or distribution in any residence hall, building, or grounds under university control of: fireworks, firearms, shotguns, rifles, hand guns, switchblade knives, any type of ammunition, explosives, and all other serious weapons.
1.5b Misuse of martial arts weaponry, BB guns, pellet guns, clubs, knives, and all other serious weapons.

Students who wish to bring firearms to the campus must obtain written permission from the chief security officer of the university. Firearms must be stored at the University Security Office except with written permission of the chief security officer of the university. At no time will any of the above dangerous weapons be allowed in the university residence halls.

Oh.

Obviously, this shooter had 'written permission from the chief security officer of the university'. Why then didn't the chief security officer of the university provide officers to stop this shooting?

Unrelated, lookit m00s3 coming out of retirement and maintaining his 0% rejection bitterness rating, scooping all us motherfucks to boot.