Because normally these type events don’t turn into long gun battles like you see on TV shows. If the youngster would have had any rounds coming his way the outcome could have been better than the way it turned out.
After reading the entire thread, while I appreciate your heartfelt concern for the loss of life, your all talking thru your butt. You have no idea what your talking about. First the shooter had a body vest on, second he was shooting with a RIFLE, never mind the brand, infinitely more accurate than a hand gun, by a factor of 10. The officer had a 9mm side arm, with effective range accurately of 10 yards or 30 feet. Just getting into range to fire with students scrambling and firing out of range could injure otherwise safe students as he was in classrooms on 2 of the 3 floors, and going up and down stairwells. So finding the shooter, getting to him, and finding cover while getting there would be difficult. If you have ever walked the halls of a 3 story school, you know the halls are very open with little cover. Now add that this guy is overweight, 54 years old and going against a teenager with good knees and hips with body armor, and you have no cover or back-up, with the wrong weapon, its a recipe for suicide.
A teacher with a .38 stands the same chance, and I notice nobody went in a fired a shot. So woulda, coulda, shoulda, is only for arm chair quarterbacks who shoot off their mouths but never have to put up or shut up. When his fellow broward sheriffs showed up, they also stayed outside, behind police cruisers...ever wonder why? Coral Gable officers went in and freed students in hiding 30 minutes after the shooting started. Condemn one, condemn all, but to say you know what you would have done is merely bravado, you were not there, you did not do anything, but unlike him, he, while behind cover, communicated with the sheriffs office, and gave what information he could, at close range, he could have taken out the shooter if he came out the west side of the school, in fact he exited from the 3rd floor down the east stairs and out of the school after dumping his vest and weapon on the third floor. Notice, no other police officer stopped him as he exited school grounds. Just sayin...