Did sisters shoot, slash mom to death after she takes their cellphones?

Two Mississippi sisters allegedly killed their mom after she took their cell phones as punishment for the daughters trying to run over her with the family car.

Nancy Grace explores the case of Erica Hall’s stabbing and shooting death. Her panel includes Los Angeles Psycho Analyst Dr Bethany Marshall, forensics expert Karen Smith, Atlanta Prosecutor Kenya Johnson, forensics psychiatrist Dr. Daniel Bober, Atlanta lawyer and judge Ashley Wilcott, and syndicated talk show host Dave Mack.