Because at this point, we have Gingerbreat Hall Father, Gingerbread Pulling-Up Then Fleeing Father, Gingerbread Calling Glen Beck Father, plus Barb Siblely and K Holden...all of these people milling around, magically just before and just after the "shooter" entered the building, and not one of the seeing "the guy."

It all stinks to high heaven.

What, did the guy have an invisibility cloak? Give me a break. That is TOO many coincidences. The school is not that big.

We're to believe that multiple parents wandering the halls heard NO glass breaking. Just some tinfoil noises...actually, they didn't even hear the noises. An EA told them there were tinfoil noises.

Then, Sibley and Holden and Manfredonia, outside, saw no shooters, and heard no shots while the people inside heard tinfoil noises.

During all these noises, the shooter slipped in, unnoticed.

Too much.