Can you kill someone while you are asleep? That's been the defense in many notable murder cases. Today, Nancy Grace and her panel look at the possibilities, including the prosecution of Scott Falater. He was accused of stabbing his wife, Yarmila, dozens of times and shoving her body into the family pool. He says he was sleepwalking. Was he?

Joining Nancy Grace today:

• James Shelnutt - 27 years Atlanta Metro Area Major Case Detective, Swat officer Lawyer www.ShelnuttLawFirm.com
• Dr. Jenn Mann - Marriage and Family Therapist, Host 'Couples 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" 
• Sheryl McCollum - Forensic Expert, Founder: Cold Case Investigative Research Institute in Atlanta, GA, ColdCaseCrimes.org, @ColdCaseTips 
• Dr. Tim Gallagher - Medical Examiner State of Florida www.pathcaremed.com
• Dr. Mark R. Pressman - Sleep and Scientific Evidence Specialist, Pressman Sleep and Science Forensics dot com, Author: "Sleepwalking, Criminal Behavior, and Reliable Scientific Evidence"
• Kristy Mazurek - Emmy Award-winning Investigative Reporter, President of Successful Strategies PR and Crisis Communications