I think the mention of that ticket is the most telling part of this depo. Is this the first time we have heard mention of the ticket outside of the internet? I think the fact that they opted to halt further discussion is 1. to let her know that LE knows (and worry her enuff to tell-all to LE) (cuz i think they are working with LE/SA on this case) and to let the defense know about the ZFG id thing.. and 2. to let it come out during the trial..
IF (and that's a huge "if") the ID they grabbed from her wallet was a ZFG one, and they can link CA to the ticket/ZFG, then Case Closed! hoping,hoping,hoping!
ETA: I am worried about AD's specificity in saying she was alone and on the phone with KC during the ticket.