Although touch DNA can be essential for forensic casework, it also comes with its share of issues.
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On May 10, 2023, Patrick Leon Nicholas was convicted of first-degree murder with special circumstances, and second-degree murder for the 1991 homicide of Federal Way high school student Sarah Yarborough.
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Since his arrest, detectives have identified two additional victims that were sexually assaulted by Martinez when they were juveniles.
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One of the first tasks for the team was to evaluate the possible race and ethnicity of the DNA profile, and they quickly concluded that this Jane Doe was in fact African-American and not Caucasian as investigators originally thought.
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Detectives with the CMPD Cold Case Unit have worked diligently in partnership with two non-profit organizations to identify these victims through forensic genetic genealogy.
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New research has revealed there is a gap between how people imagine they’d act if sexually harassed and how those who experience it respond.
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The museum worked with a local detective to test the stain using phenolphthalein, but the test failed to provide a presumptive positive for blood.
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Members of a university’s jiu jitsu club recently teamed with forensic scientists to stimulate real-world assaults and fill a large knowledge gap in trace evidence.
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A man whose skeletal remains were found in 1986 has been identified, and special agents with the Tennessee Bureau of Investigation are asking for the public’s help to determine who killed him.
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This work has conclusively linked both homicides to the same offender.
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