Just a query...but do you or any have an opinion as to why it is being reported that this might be a planned escape.
Apparently (and according to WSB Radio), this particular courtroom is in the old Fulton County courthouse (which is connected to the newer one) building. That particular building had larger courtrooms but no holding cells.
As a result, Nichols was being held in the jury room with an armed deputy. Nichols took the gun from the deputy, shot her, and barged into the courtroom where a different hearing was taking place.
I'd wager that Nichols planned when to make his move - hence the notion of a "planned escape."