DNA: ID DNA: ID

Patricia 'Patsy' Barnes Part 2 of 2

Sep 14, 2026 · 39m

Summary

This episode details the 2022 resolution of the 1995 murder of Patricia Barnes, a homeless woman in Seattle. Detective Michael Grant reopened the cold case, initially ruling out serial killer Robert Lee Yates before focusing on new DNA evidence. Through retesting physical evidence and using investigative genetic genealogy, authorities identified Douglas Keith Crohn as the killer. Crohn, who had a history of mental illness and property crimes, was confirmed via DNA matches on a cigarette butt, sleeping bag, and the victim’s body. The case highlights the critical role of modern forensic techn…

Topics discussed

Ruling out serial killer Robert Lee Yates Reopening the case and retesting DNA evidence Reviewing suspects: Wayne Harmon and Marvin Kay Anonymous tip and investigation of Robert Hirschberg Failed attempts to obtain Harmon's DNA The red herring of the rubber gloves Initial DNA results and exclusion of Marvin Kay Surreptitious DNA collection from Wayne Harmon Definitive DNA match and exclusion of Harmon Identifying Douglas Crone via genetic genealogy Background and criminal history of Douglas Crone The accidental death of Douglas Crone in 2016 Press conference and family reactions Analysis of the crime and missed DNA collection Reflections on the case and victim's life Promotional segment for A Date with Dateline Show credits and subscription information
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