The Turquoise Ring: How Frozen DNA Finally Caught Her Killer
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The Turquoise Ring: How Frozen DNA Finally Caught Her Killer
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概要
Cold and silent at -11°F with wind chill, a county grader blade unearthed Kathleen Dempsey beneath eighteen inches of packed snow on January 14, 1991 - and a turquoise ring on her left index finger that no family member had ever seen. That ring and a frozen collar swab sat untouched in a sheriff’s freezer for 31 years until degraded male DNA from that swab yielded familial matches within seven days of upload - but who did that DNA lead to?
In this episode, we lay out the facts of the case from the night she disappeared to the forensic breakthrough three decades later, following how investigators turned two distant GEDmatch and FamilyTreeDNA hits into a family tree and narrowed suspects - who did the partial profile identify?
Person: Kathleen Dempsey
Date: January 14, 1991
Location: Depot Road (body found); Vander Avenue (abandoned Pontiac)
Status: Cold case reopened; partial male DNA profile uploaded to GEDmatch and FamilyTreeDNA
Event: Turquoise ring found on left index finger; collar swab produced degraded but usable DNA
- Kathleen Dempsey was 24 years old and missing for 11 days before her body was found.
- The grader blade struck her body at 4:15 AM after a night at -11°F with wind chill and 18 inches of packed snow and frozen clay.
- The turquoise ring was sized for the left index finger and was unknown to her mother, sister, and bowling teammate.
- The evidence envelope and collar swab remained sealed in the Harwick County Sheriff’s Office freezer for 31 years.
- After a private lab processed the swab in spring 2022, two familial matches appeared within seven days on GEDmatch and FamilyTreeDNA.
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