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NCJRS Abstract

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NCJ Number: 163581 Find in a Library
Title: Bacterial Contamination in a Mixed Semen-Vaginal Sample From a Sexual Assault-Murder Case
Journal: Canadian Society of Forensic Science Journal  Volume:29  Issue:1  Dated:(March 1996)  Pages:21-28
Author(s): D Michaud; P Gagnon
Date Published: 1996
Page Count: 8
Type: Report (Technical)
Format: Article
Language: English
Country: Canada
Annotation: In 1991, a case was received at the Royal Canadian Mounted Police's Central Forensic Laboratory in which a young woman was sexually assaulted and murdered.
Abstract: Vaginal samples taken during the autopsy were submitted by police, along with comparison samples from the deceased, her boyfriend, and a suspect. While performing semen identification tests, substantial microbial contamination was noticed in the vaginal samples. The DNA profile from the epithelial fraction showed a mixture consistent with the deceased and three other unexplained fragments. The sperm cell fraction, which did not show any bacterial contamination, was the forensically important sample. Sample fractions are characterized, and suggestions are offered to help forensic biologists recognize the occurrence of microbial contamination in a human DNA profile. 19 references, 1 table, and 2 figures
Main Term(s): Science and Technology
Index Term(s): Blood/body fluid analysis; Canada; Crime in foreign countries; Criminal investigation; Criminalistics; DNA fingerprinting; Evidence identification; Foreign police; Forensic medicine; Forensic sciences; Homicide investigations; Murder; Psychologists; Suspect identification; Victims in foreign countries; Victims of violent crime; World criminology
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