Whichever versions true (and I suspect, as usual, it is somewhere between the two) then the security and the authorities are in the wrong.
It should not have been easy to go through a closed lane, whether delibrately, accidentally or directed by security personnel. Now the most this woman should get is a slap on the wrist for dodging securiy, if it can be shown that she intentionally did so. Seeing people here say how confusing security can be at this airport, I can't see how they can even make that stick. she should certainly not be treated as a criminal, now she is shown not to be a terrorist.
On Final - no chance of suing them, is there?