Watch “How it Really Happened with Hill Harper” Sundays at 9 p.m. ET/PT only on HLN.

(CNN) —  

In 2008, two-year-old toddler, Caylee Anthony, vanishes. Her mother, Casey Anthony, tells investigators Caylee has been kidnapped by her nanny, a woman Anthony’s family has never actually seen. Why was Anthony lying? And where was Caylee? This extraordinary two-part episode follows the twists and turns of this bizarre case, and unbelievable trial.