DNA/RNA co-analysis of seminal fluid-stained fabrics after water immersion for up to seven days

Kulstein, Galina; Wiegand, Peter

doi:10.1016/j.fsigss.2017.09.015

Cited by 1 publication

(1 citation statement)

References 7 publications

(9 reference statements)

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“…Whether lysed or not, foam may cause unexpected inhibition of the PCR, although its high concentration of water may render that effect benign. DNA profiles may (55) or may not (54,56,57) be developed after water submersion, or even after evidence in a fire has been extinguished with water (58).…”

Section: Figmentioning

confidence: 99%

Blast Suppression Foam, Aqueous Gel Blocks, and their Effect on Subsequent Analysis of Forensic Evidence*

Monson

Kyllonen²,

Leggitt

et al. 2020

Journal of Forensic Sciences

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In addition to having blast mitigation properties, aqueous foam concentrate AFC-380 blast suppression foam is designed to capture aerosolized chemical, biological, and radioactive particles during render-safe procedures of explosive devices. Exposure to aqueous environments and surfactants may negatively affect forensic evidence found at the scene, but the effects of AFC-380 foam and aqueous gel on the preservation and subsequent analysis of forensic evidence have not previously been investigated. Sebaceous finger and palm prints and DNA samples on paper, cardboard, tape, and various metal and plastic items, along with hairs, carpet and yarn fibers, and inks and documents, were exposed to AFC-380 foam. Similar mock evidence was also exposed to a superabsorbent gel of the type found in aqueous gel blocks used for shrapnel containment. Exposure to foam or aqueous gel was associated with a dilution effect for recovered DNA samples, but quality of the samples was not substantially affected. In contrast, exposure to AFC-380 foam or gel was detrimental to development of latent finger and palm prints on any substrate. Neither the hair nor the fiber samples were affected by exposure to either the foam or gel. Indented writing on the document samples was detrimentally affected by foam or gel exposure, but not inks and toners. The results from this study indicate that most types of forensic evidence recovered after being exposed to aqueous gel or blast suppression foam can be reliably analyzed, but latent finger and palm prints may be adversely affected.

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Section: Figmentioning

confidence: 99%