Nancy Grace is livid at Casey Anthony -- slamming her new legal advocate gig as a shameless cash grab and insisting the focus should remain on her murdered daughter, Caylee.

Casey Anthony gained national notoriety after she was accused and acquitted of the 2008 killing of her 2-year-old daughter Caylee Anthony.

The former attorney for the parents of Casey Anthony, the woman dubbed "America's most hated mom," shared his reaction to her new video series as an "advocate."