Casey Anthony's Mom Has a Panic Attack Discussing Granddaughter Caylee's Disappearance (Exclusive)

In ET's exclusive first look at 'Casey Anthony’s Parents: The Lie Detector Test,' Casey Anthony's mother, Cindy, has a panic attack while discussing her granddaughter Caylee's disappearance. 'Casey Anthony’s Parents: The Lie Detector Test' airs Jan. 4 on A&E and Lifetime