[ArmstedFragg]

what's the hold-up in producing an accurate time-line of events

125 conflicting eyewitness accounts, most likely.

[Dr. Eckleburg]

I mean an even more basic timeline. When did the police manage to get into the building? Did any police see the shooter or exchange shots with him?

That classroom building is huge. Was more than one door chained? All of them? That takes time.