A Chicago Ph.D. student is now facing murder charges after she shot and killed her ex-boyfriend. Nijinsky Dix had been dating Terry Hickman for three months. Police, responding to reports of gunfire, find Dix kneeling beside the bullet-riddled body of the 44-year-old.Joining Nancy Grace today:James Shelnutt - 27 years Atlanta Metro Area Major Case Detective, Swat officer Lawyer www.ShelnuttLawFirm.comDr. Jenn Mann - Marriage and Family Therapist, Host 'Couples Therapy' and 'Family Therapy' on VH1, "The Dr. Jenn Show” on Sirius XM, Author: "The Relationship Fix: Dr. Jenn’s 6-Step Guide to Improving Communication, Connection and Intimacy", doctorjenn.comDr. Priya Banerjee, M.D.  - Board Certified Forensic Pathologist, Anchor Forensic Pathology Consulting, Assistant Medical ExaminerDan Corsentino - Former Police Chief, Former Sheriff, Served on US Homeland Security Senior Advisory Board, Private Investigator www.dancorsentino.com Alexis Tereszcuk - CrimeOnline.com Investigative Reporter, Writer/Fact Checker, Lead Stories dot Com, Twitter: @swimmie2009