'BLOOD, CARNAGE, HORRIFIC,' July 4 Shootings: 'Perp Dressed Like Girl'

<p>Police say Monday's holiday mass shooting had been planned for weeks.</p> <p>Seven people died and dozens were injured as Robert Crimo III fired as many as 70 rounds into the crowd from a Highland Park rooftop. The shooter accessed the roof via a fire escape ladder, then fled the scene wearing women’s clothing. </p> <p>An AR-15-type weapon was used n the assault, but police say Crimo bought the rifle used in the deadly shooting legally — along with four other firearms.   </p> <p>Joining Nancy Grace today:</p> <ul> <li>Lisa Fine-Cavalli, Vegas Mass Shooting Survivor (Oct 1, 2017), Co-Founder: Route91Strong, Twitter: @LisaFineLove, Facebook.com/Route91Strong</li> <li>Dale Carson - High Profile Attorney (Jacksonville), Former FBI Agent, Former Police Officer, Author: "Arrest-Proof Yourself, DaleCarsonLaw.com</li> <li>Dr. Jillian Peterson - Forensic Psychologist, Professor of Criminal Justice at Hamline University (St. Paul, MN), Expert on Mass Shootings and Violence Prevention, Author: "The Violence Project: How to Stop a Mass Shooting Epidemic", theviolenceproject.org, Twitter: @JillKPeterson,</li> <li>Dr. Michelle DuPre - Former Forensic Pathologist, Medical Examiner and Detective: Lexington County Sheriff's Department, Author: "Homicide Investigation Field Guide" &amp; "Investigating Child Abuse Field Guide", Forensic Consultant, DMichelleDupreMD.com </li> <li>David Katz - Former Senior Special Agent with the DEA, Founder and CEO: Global Security Group, Inc., Active Shooter Response Expert,</li> <li>Lynn Sweet - Washington Bureau Chief, Chicago Sun-Times, Witness at Fourth of July Parade </li> </ul><p>See <a href="https://omnystudio.com/listener">omnystudio.com/listener</a> for privacy information.</p>