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Analysis of Mitochondrial DNA from a Burned, Ninhydrin-Treated Paper Towel
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Immunology, Genetics and Pathology, Medicinsk genetik och genomik.
Swedish Police Author, Div Invest, Forens Sect, S-10675 Stockholm, Sweden..
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Immunology, Genetics and Pathology, Medicinsk genetik och genomik.
2016 (English)In: Journal of Forensic Sciences, ISSN 0022-1198, E-ISSN 1556-4029, Vol. 61, no 3, 828-832 p.Article in journal (Refereed) Published
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Text
Abstract [en]

Contact-based evidence is likely to have limited quantities of DNA and may yield mixed profiles due to preexisting or contaminating DNA. In a recent arson investigation, a paper towel was collected and used as circumstantial evidence. The paper towel was partially burned and was likely set on fire with flammable liquid. As part of the investigation, the paper towel was treated with ninhydrin to visualize fingerprint evidence. Initial DNA analysis of two swabs was negative for short tandem repeat (STR) markers and revealed a mixture of mitochondrial DNA (mtDNA). Analysis of 13 additional cuttings yielded four more mixed profiles, but also two samples with a common single-source profile. The single-source mtDNA profile matched that of the primary suspect in the case. Thus, even if initial mtDNA analysis yields a mixed profile, a sampling strategy involving multiple locations can improve the chance of obtaining valuable single-source mtDNA profiles from compromised evidence in criminal casework.

Place, publisher, year, edition, pages
2016. Vol. 61, no 3, 828-832 p.
Keyword [en]
forensic science, DNA typing, mixed mtDNA profile, mitochondrial DNA, ninhydrin, trace DNA, paper towel
National Category
Forensic Science
Identifiers
URN: urn:nbn:se:uu:diva-297334DOI: 10.1111/1556-4029.13054ISI: 000375076000036OAI: oai:DiVA.org:uu-297334DiVA: diva2:942179
Funder
VINNOVA
Available from: 2016-06-23 Created: 2016-06-22 Last updated: 2016-06-23Bibliographically approved

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