Explosive blast effects on latent fingerprints

Кузнецов, В. А.; Sunde, Jadranka; Thomas, Michael

doi:10.4108/e-forensics.2008.2676

Cited by 2 publications

(5 citation statements)

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“…Fingerprint development from various tapes and galvanized metal flats exposed to aqueous gel was usually successful, but not so for metal pipe, PVC, glass, cardboard, or paper substrates. For the metal items, these observations are contrary to those of Kuznetsov et al (41), who reported greater postblast damage to fingerprints on light plates than on heavy plates. Successful development on tapes is plausible, due to their entrapment on the adhesive side or by residual adhesive on the other side, remaining when removed from the roll.…”

Section: Discussioncontrasting

confidence: 95%

“…When fragmentation of evidentiary material increases, the information that can be extracted decreases. Nevertheless, latent fingerprints (39)(40)(41)(42) and DNA profiles (39,(42)(43)(44)(45)(46)(47) can sometimes be developed from explosive evidence.…”

mentioning

confidence: 99%

“…Latent fingerprints may be developed after exposure to adverse environmental conditions. Fingerprints can sometimes be recovered from materials exposed to elevated temperatures, even though eccrine components are degraded by the heat of an IED deflagration (39)(40)(41)(59)(60)(61)(62). immersion or exposure, although eccrine-rich prints, consisting of water-soluble components such as amino acids, are particularly vulnerable (63,64).…”

mentioning

confidence: 99%

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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: Discussioncontrasting

confidence: 95%

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confidence: 99%

mentioning

confidence: 99%

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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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“…A first limitation of the current study is the use of a low amount of C-4 (7 g) compared to real-life cases in order of magnitude in which terrorists often use a larger amount of explosive. This difference has an effect on the temperature developed during the blast 19 and subsequently on the possibility of recovering FPs and DNA from the IED components 18,27,28 , as well as on the fragmentation of the IED itself 29 . A higher amount of explosive implies a more challenging recovery of FPs and potential DNA carrier components.…”

Section: Discussionmentioning

confidence: 99%

“…We therefore acknowledge that the results produced in the current study could be overestimating the chances of producing FP and DNA-profiles compared to real-life scenario's. However, it must be noted that due to the complex nature of explosions, it is not yet possible to easily predict the magnitude of the blast effects 29 . A second limitation is the limited number of cans detonated and neutralised in the study.…”

Section: Discussionmentioning

confidence: 99%

Survival of forensic trace evidence on improvised explosive devices: perspectives on individualisation

Vanderheyden

Verhoeven²,

Vermeulen³

et al. 2020

Sci Rep

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Neutralisation of improvised explosive devices. A ballistic water jet was fired onto the suitcases with a RE70 M3 Plus Waterjet Disruptor (Chemring Technology Solutions). This weapon interrupts electrical circuits without recoil by firing an electrically initiated 0.5 caliber cartridge. This cartridge contains a projected waterjet of 150 ml, fired under high pressure. The weapon was oriented 45 • with the longitudinal surface of the suitcase. After each disarmament, fragments were collected and packaged separately. A test setup of this experiment can be found in Supplementary Figure S2. Detonation of improvised explosive devices. Prior to the experiment, a safety perimeter of 200 m was set. A measured amount of C-4 (7 g) was placed in the metal cans and the suitcases were closed with a zipper. The ignition was electrically initiated from a distance. The presence of wooden crates around each side of the test setup prevented the spread of post-explo fragments. Relocation of the test setup after every explosion prevented cross-contamination. After each detonation, fragments were collected and packaged separately. The test setup of this experiment can be found in Supplementary Figure S3.

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Explosive blast effects on latent fingerprints

Cited by 2 publications

References 0 publications

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

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

Survival of forensic trace evidence on improvised explosive devices: perspectives on individualisation

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