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After 44 Years, Cigarette DNA Convicts Man in 1982 Killing of California Teen

Familial genetic genealogy led investigators to the Unick family, with a discarded cigarette providing the DNA match.

Overview

  • A Sonoma County jury on February 13 found James Oliver Unick guilty of murdering 13-year-old Sarah Geer, with a sexual-assault special circumstance.
  • Prosecutors say the conviction carries life without parole, and sentencing is scheduled for April 23.
  • Investigators created a suspect DNA profile in 2003 from sperm on Geer’s clothing, but it did not match law-enforcement databases at the time.
  • In 2021 the Cloverdale Police Department reopened the case, bringing in a private investigator, the California DOJ, and the FBI to apply advanced genetic genealogy.
  • FBI analysts narrowed the source to one of four brothers and confirmed Unick’s identity by matching DNA from a discarded cigarette to DNA on Geer’s clothing, and jurors rejected his account after about two hours of deliberation.