20/20: Sex Assault Spree Investigation Solves 1996 Cold Case Murder

The Debbie Dorian Murder Case

• 🎯 In 1996, Debbie Dorian, a 22-year-old co-ed at Fresno State, was found brutally assaulted, raped, and murdered.
• ❄️ DNA was recovered from the crime scene, but the case went cold for several years.
• ❌ Investigators initially arrested the wrong suspect due to less accurate DNA technology at the time, which temporarily diverted the investigation.

Linking Cases with DNA

• ⚡ A string of sexual assaults in a nearby neighborhood provided a crucial new lead.
• 🧬 DNA recovered from these assaults matched the DNA found at the scene of Debbie Dorian's murder, keeping the investigation active.
• ⏳ Despite the DNA match, it took over 30 years from the initial murder for new genetic technology to finally identify a suspect.

Breakthrough with Genetic Genealogy

• 💡 The breakthrough came with new genetic technology, specifically genetic genealogy trees, which allowed investigators to analyze public DNA evidence.
• 👤 The suspect was not in the criminal database, making traditional methods insufficient.
• 🗣️ A brave survivor, referred to as Jane Doe number one, came forward after decades, providing crucial DNA evidence from her own assault.
• 🤝 This case highlights the convergence of brave witnesses, diligent police work, and advanced technology in solving complex cold cases.

Episode Details

• 📺 The story is featured in a new 20/20 episode titled "I'm Going to Get You."
• 📺 The episode airs on Channel 7 and will be streaming on Hulu and Disney Plus.