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Elizabeth Short was an American woman found nude, murdered in Los Angeles, California, in 1947.
She became known as the "Black Dahlia." The case was highly publicized due to its gruesome nature, and remains unsolved.
The Zodiac killer, pseudonym of an unidentified serial killer, murdered at least five people in the San Francisco Bay Area over the span of about nine months. He claimed in letters to have killed 37 people, but he was never identified.
A new book suggests a conclusion, a connection between the death of the "Black Dahlia" and The Zodiac killer. Alex Baber, Director at 'Cold Case Consultants of America' says he's used AI and his code breaking skills to crack the Zodiac Killer's letter.
The Zodiac Killer and Black Dahlia killer are the same.
Joining Nancy Grace today:
Alex Baber - Director at 'Cold Case Consultants of America'
Neama Rahmani - Former Federal Prosecutor-turned-trial Attorney; Author: “Harvard to Hashtag;" INSTAGRAM: @Neamarahmani; X: @NeamaRahmani
Dr. Angela Arnold - Psychiatrist, Atlanta GA. Expert in the Treatment of Pregnant/Postpartum Women, Former Assistant Professor of Psychiatry, Obstetrics and Gynecology: Emory University, Former Medical Director of The Psychiatric Ob-Gyn Clinic at Grady Memorial Hospital
Sheryl McCollum - Cold Case Investigative Research Institute Founder, ColdCaseCrimes.org, Host of podcast: Zone 7 -- and Author of a new book: "Swans Don't Swim in a Sewer: Solving the Cold Case of the Flint River Killer's Daughter;" X: @149zone7
Joseph Scott Morgan - Professor of Forensics: Jacksonville State University, Author of "Blood Beneath My Feet," and Host: "Body Bags with Joseph Scott Morgan;" X @JoScottForensic, Instagram @JoScottForensic
Rachel Sharp - Crime Reporter from DailyMail.com
Sydney Sumner - Investigative Reporter, ‘Crime Stories’
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A friend of R&B artist D4vd was apprehended in Montana after authorities reported that he failed to show up as a witness in a homicide case in Los Angeles involving the death of a teen girl Celeste Rivas.
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Nearly four decades after the Colonial Parkway murders first shocked Virginia, new DNA links have expanded the known scope of the case while raising questions about investigative accountability.
In this episode of "Zone 7," Sheryl McCollum is joined by Bill Thomas, whose sister Cathy Thomas was one of the original victims, and Kristin Dilley, his long-time investigative partner and co-host of the podcast, "Mind Over Murder."
They walk through the latest DNA identifications tied to Alan Wade Wilmer Sr., the procedural barriers that keep his profile out of CODIS, and the growing divide between state-level momentum and federal inaction.
Their discussion centers on what happens when evidence advances while communication and action stall.
Enjoying Zone 7? Leave a rating and review where you listen to podcasts. Your feedback helps others find the show and supports the mission to educate, engage, and inspire.
Guest Bios:
Bill Thomas is a victim advocate and the brother of Cathy Thomas, one of the original victims of the Colonial Parkway murders. For nearly four decades, he has worked with law enforcement, forensic experts, and journalists to seek answers in his sister’s case and accountability for all affected families. Bill is co-host of the podcast, "Mind Over Murder," where he focuses on cold cases, investigative transparency, and the systemic challenges families face in long-term homicide investigations.
Kristin Dilley is a true crime podcaster, researcher, writer, and teacher based in Williamsburg, Virginia. Kristin has worked alongside Bill Thomas for more than seven years and is the co-host of "Mind Over Murder," where she examines cold cases with an emphasis on evidence, patterns, and victim-centered accountability.
About the Host
Sheryl “Mac” McCollum is an active crime scene investigator for a Metro Atlanta Police Department and the director of the Cold Case Investigative Research Institute, which partners with colleges and universities nationwide. With more than 4 decades of experience, she has worked on thousands of cold cases using her investigative system, The Last 24/361, which integrates evidence, media, and advanced forensic testing.
Her work on high-profile cases, including The Boston Strangler, Natalie Holloway, Tupac Shakur and the Moore’s Ford Bridge lynching, led to her Emmy Award for "CSI: Atlanta" and induction into the National Law Enforcement Hall of Fame in 2023.

Social Links:
• Email: [email protected]
• Twitter: @149zone7
• Facebook: @sheryl.mccollum
• Instagram: @officialzone7podcast

Preorder Sheryl’s upcoming book, "Swans Don’t Swim in a Sewer: Lessons in Life, Justice, and Joy from a Forensic Scientist," releasing May 2026 from Simon and Schuster.

Highlights:
• (0:00) Sheryl McCollum opens Zone 7by addressing stalled accountability in long- running cold cases
• (0:45) Bill Thomas and Kristin Dilley return to Zone 7 and reflect on their investigative partnership
• (2:00) Bill remembers his sister Cathy Thomas, her Naval Academy legacy, her character, and her friend Rebecca Ann Dowski
• (5:15) How advocacy and podcasting have helped families move forward on the Colonial Parkway murders
• (9:15) The January 2024 public announcement linking Allen Wade Wilmer Sr. to multiple victims
• (10:15) The confirmed DNA connection to Laurie Ann Powell
• (13:15) Why Wilmer’s DNA is not in CODIS despite evidence of sexual assault
• (17:00) Federal communication failures and the limits of victim services updates
• (19:15) The contrast between FBI silence and Virginia State Police persistence
• (22:45) Whether Cathy Thomas’s case is closer to resolution and what emerging patterns suggest
• (25:15) Evidence handling failures and the long-term consequences for families
• (33:15) Closing reflections on persistence, accountability, and the cost of waiting decades for answers


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