Police respond to a 911 call in the high society area of the Hamptons at the Montauk Yacht Club shortly after midnight.

Martha Nolan-O'Slattarra, a fashion designer from Ireland, is found unresponsive on a boat named "Ripple." The yacht is reportedly owned by insurance mogul Christopher Durnan, 60, who was present at the scene and allegedly ran down the dock screaming for help.

The wealthy yacht owner was once accused of fighting and biting a former New York firefighter during a tribute concert, commemorating 20 years after the 9/11 terror attacks.

CPR is attempted by a good Samaritan, but first responders pronounce Martha dead at the scene. Initial autopsy results showed no signs of violence. As rumors swirl of drug overdose, Martha's family strongly denies those claims and rumors of brain cancer by hiring attorney Arthur Aidala to ensure a thorough investigation is performed. 

The official cause of death is inconclusive. Still no charges in the case, but the yacht owner has been hit with a multimillion dollar wrongful death suit. 

Joining Nancy Grace Tonight:

Jo-Anna Nieves  - Criminal defense attorney and Founder of The Nieves Law Firm, website: thenieveslawfirm.com, Instagram, Facebook and X: nieveslawfirm, YouTube and TikTok: thenieveslawfirm 

Dr. Chloe Carmichael  -  Clinical Psychologist, Author: ‘Nervous Energy: Harness The Power of Your Anxiety”, Twitter: @DrChloe, drchloe.com 
Dan Murphy - Former NYPD Detective-Sergeant, Joint Terrorism Task Force, Former Chief Security Officer, US Bancorp, Co-Host of "Gold Shields" Podcast, Author: “Workplace Safety: Establishing an Effective Violence Prevention Program” 
Jeff Gentry  -  Forensics-Certified Bloodstain Pattern Analyst, Senior Crime Scene Analyst and Death investigator, Former Toxicology Lab Analyst, Author: "Forensic Science: Applications to Death and Crime Scene Investigations" ; TikTok: @jeffreygentryBPA, FB: Jeff Gentry Bloodstain Pattern Analyst, Website: Evidenceoverassumption.com  
Brian Harmon  - Executive editor, Greaterlongisland.com,  former Daily News assistant metro editor and NY Press Association Writer of the Year 

Dave Mack - Investigative Reporter, 'Crime Stories'