I think there is no way anything Casey said to LP, TP, Tracy or Rob is covered by the A/C privilege. How could she have been seeking legal advice or assistance from them? Even if they WERE hired by the defense as bodyguards (which they clearly were not), I don't think the A/C privilege would apply. I think, if you want to preserve your privilege, you need to shut your trap when around people who aren't providing legal services. That includes bodyguards, drivers, pizza delivery boys, etc., whether your lawyer hired them or not.
OOOOH- good point.