DNA

Use it or Lose it: Is expertise in some body fluid examinations being lost?

Forensic body fluid analysis includes tests for urine stains As body fluid examinations have become heavily focused on the ability to obtain a DNA profile, the expertise in analysis and interpretation of tests for some of the more rarely encountered body fluids, including urine and faeces, has become limited.  Some of the main forensic providers no longer offer this testing under their UKAS Accreditation.  In a case, reviewed by Forensic Context, in which there was an allegation of the offender urinating onto the clothing of the complainant, the lack of any testing for urine was questioned by the defence and clarity sought as to whether testing was possible or simply not offered by the prosecution provider.

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DNA transfer through non-intimate contact

Male and Female symbols

In sexual offence cases where no semen is detected, the presence of female DNA on penile swabs and underwear of the defendant may be put forward to address the issue of whether or not sexual intercourse took place.  However it is known that DNA can be transferred through non-intimate contact so research was commissioned to investigate the frequency and amount of DNA which might be transferred in this way.  The work was recently published in Science and Justice by the UK and Ireland Association of Forensic Science Providers’ Body Fluid Forum which our expert Julie Allard co-chaired at the time of the research.
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