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Foreign DNA in cosmetic gel nails
Meike M de Boer1, Shosha N P Wiznitzer1, Peter J van Koppen2
1Faculty of Law, VU University Amsterdam, De Boelelaan 1077, 1081 HV Amsterdam, the Netherlands.
Forensic Science International
|January 3, 2021
Summary
Foreign DNA can be encapsulated in cosmetic gel nails, potentially explaining its presence under fingernails long after contact. This finding challenges direct DNA evidence in forensic cases.
Area of Science:
- Forensic Science
- Cosmetic Science
Background:
- Investigated the plausibility of foreign DNA encapsulation in cosmetic gel nails.
- Inspired by a murder case involving DNA evidence found under the victim's fingernails.
Observation:
- An experiment tested if foreign DNA could be recovered from gel nails two weeks after transfer.
- Four female individuals participated in the study.
Findings:
- DNA profiles from the donor were detected in six out of eight hands.
- Demonstrated that foreign DNA can remain encapsulated in gel nails for at least two weeks.
Implications:
- Suggests that DNA found under fingernails may not always indicate recent contact or assault.
- Highlights the need to consider DNA encapsulation in gel nails as a potential explanation in forensic investigations.
- Recommends re-evaluating the interpretation of DNA evidence in similar legal cases.
