Christmas shopping trip turns deadly for 7-year-old girl. Who shot Kennedy Maxie?

A beloved young girl heads to the mall in an affluent Atlanta neighborhood with her Mom and aunt. She never makes it home. Kennedy Maxie is shot in the head as the family leaves the parking lot. The 7-year-old dies from her wounds, but who shot Kennedy Maxie? Joining Nancy Grace today:Ashley Willcott - Judge and trial attorney, anchor at Court TV,www.ashleywillcott.com Dr. Angela Arnold - Psychiatrist, Atlanta Ga www.angelaarnoldmd.comSheryl McCollum - Forensic Expert & Cold Case Investigative Research Institute FounderDr. Tim Gallagher - Medical Examiner for the State of Florida - www.pathcaremed.comMichael Seiden WSB TV Channel 2 Atlanta TWITTER: @SeidenWSBTV