Margarette Eby was murdered in 1986. In an investigation led by Genesee County (MI) Prosecutor Arthur Busch and the Michigan State Police, two cold case rape-murders were solved using the most advance forensic science available.

Key details regarding the case:

• Date: She was found on November 9, 1986, having last been seen on November 7, 1986.
• Location: She was murdered in her home at the Mott family estate in Flint, Michigan.
• Perpetrator: Jeffrey Gorton, a sprinkler system installer who worked on the estate, was identified via DNA evidence and charged in 2002.
• Outcome: Gorton pleaded no contest in Genesee County, Michigan (Flint) to the murder and was sentenced to life in prison. 

We walk you through how a partial print on a faucet and carefully stored biological evidence waited years for the right moment, then unlocked a chain of breakthroughs that tied two murders to one man.

We break down why so many late‑20th‑century investigations stalled: reliance on eyewitness memory, confessions, and limited lab tests that hinted at guilt but rarely proved identity. Then we zoom into the tools that changed the map. AFIS took fingerprint comparison from magnifying glasses to searchable databases, and STR DNA profiling built full genetic identities from the tiniest trace. With CODIS linking labs across states, an old profile from Flint collided with a new profile from a hotel near an airport, revealing a single serial predator hiding in plain sight. Along the way, we revisit the Mary Sullivan case in Boston and the capture of the Golden State Killer to show how forensic genealogy fills gaps when offenders aren’t in criminal databases.

What ties it all together isn’t luck—it’s infrastructure. Proper evidence storage turns slides and swabs into time‑delayed witnesses. Dedicated cold case units create focus where daily caseloads can’t. Updated databases make every new arrest, every new algorithm, and every fresh upload ripple across past scenes. For families, a late arrest doesn’t erase loss, but it affirms that loved ones were not forgotten. For offenders, the takeaway is stark: time no longer offers cover.

If this story moved you, subscribe, share the show with a friend, and leave a review telling us which case changed your view of cold case work. Your voice helps fund the labs, units, and training that keep justice from aging out.

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