Nine-year-old Debbie Randall is abducted while walking home from the laundromat, just yards from her family's apartment.

Sixteen days later, her brutalized body is found dumped eight miles away. Despite law enforcement's best efforts, the seemingly random killer has been unidentified for nearly 50 years. Investigators discover a small rag inside Randall's vaginal cavity and initial testing reveals a partial DNA sample. The sample is sent through CODIS, but no one in the prison system, not even executed prisoners, is a match. 

As DNA testing improves, investigators use genetic genealogy to find the killer. William Rose, 24 at the time of the murders, committed suicide just two years after Randall's murder. Randall's brother says he believes the weight of what Rose did to Debbie led Rose to take his own life.

Joining Nancy Grace Today: 

• Melvin Randall - Brother of Debbie Lynn Randall 
• Flynn D. Broady Jr. - Cobb County District Attorney
• Dr. Angela Arnold – Psychiatrist, Atlanta GA. Expert in the Treatment of Pregnant/Postpartum Women, Former Assistant Professor of Psychiatry, Obstetrics, and Gynecology: at Emory University, Former Medical Director of The Psychiatric Ob-Gyn Clinic at Grady Memorial Hospital
• Morris Nix – Former Detective, Cobb County Cold Case Unit 
• Joe Scott Morgan – Professor of Forensics: Jacksonville State University, Author, "Blood Beneath My Feet," and Host: "Body Bags with Joseph Scott Morgan;" Twitter: @JoScottForensic 
• Toby Wolson - Forensic Consultant Specializing in DNA, Serology, and Bloodstain Pattern Analysis
• Jessica Noll - Investigative Journalist, Co-Host, and Producer of the “The Investigators” Podcast