Further investigations into the single metal deposition (SMD II) technique for the detection of latent fingermarks

Newland, Talia; Moret, Sébastien; Bécue, Andy; Lewis, Simon W.

doi:10.1016/j.forsciint.2016.09.004

Cited by 20 publications

(13 citation statements)

References 31 publications

(42 reference statements)

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“…The difference shown here is quite obvious, with 10% more marks going undetected on the plastic sleeves, which would justify further research into non-porous substrate interactionsparticularly plasticswith fingermark detection techniques. Previously, there has been a correlation observed in other studies between paper type and fingermark quality [10,28,29].…”

Section: Effect Of Substratementioning

confidence: 75%

Investigation of some of the factors influencing fingermark detection

Chadwick

Moret

Jayashanka

et al. 2018

Forensic Science International

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The primary aims of fingermark detection research are to improve the quality and increase the rate of detection of identifiable impressions. This is usually performed through the development of new methods and technologies to provide alternatives to or improve current procedures. While research of this nature is important to pursue, it fails to address the underlying question related to the factors that affect the detection of a latent fingermark. There has been significant research that has examined the differences between techniques, donors and fingermark age, as well as the composition of latent fingermarks. However, they tend not to focus on determining how these factors influence the quality of the developed mark. This study involved the development and evaluation of over 14,000 natural fingermarks deposited on a variety of surfaces to examine the effect of substrate, age, donor variability (both inter- and intra-), depletions and type of finger on fingermark development. Fingermarks were deposited on four substrates (two non-porous and two porous) and developed with either indanedione-zinc (IND-Zn) or cyanoacrylate followed by rhodamine 6G staining (CA+R6G). Three independent assessors graded each mark on the quality of development using an absolute scale proposed by the UK Centre for Applied Science and Technology (CAST). The data generated from these assessments were then analysed for trends or other useful insights. The results from this work reaffirm that individual substrate characteristics (and the choice of development technique) play a significant role in determining the number and quality of marks developed. It was found that fingermarks were more likely to be detected on porous substrates and to also be of a higher quality than on non-porous. The effect of fingermark donor variability was also explored, with significant differences observed between donors and within donors. This research shows that current detection techniques do not detect all available fingermarks, reinforcing the need for further research into the fundamentals of fingermark detection in order to gain a better understanding of the techniques currently used. The study has identified considerations for the development of novel techniques and how we need to account for variability when designing fingermark research experiments.

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Section: Effect Of Substratementioning

confidence: 75%

Investigation of some of the factors influencing fingermark detection

Chadwick

Moret

Jayashanka

et al. 2018

Forensic Science International

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“…SMD can develop more samples in one solution bath, without any major detriment on the quality of the fingermarks while also enhancing 50% more fingermarks than MMD. Newland et al reported producing grade 2 fingermarks (Fig. ) when using SMD on aluminum foil (among others), adding also that the method does not seem to be hindered by the environmental conditions (i.e., heat).…”

Section: Physicochemical Methodsmentioning

confidence: 99%

“…Fingermark on aluminum foil developed with single‐metal deposition . [Color figure can be viewed at wileyonlinelibrary.com]…”

Section: Physicochemical Methodsmentioning

confidence: 99%

Detection of Fingermarks—Applicability to Metallic Surfaces: A Literature Review

Christofidis

Morrissey

Birkett

2018

Journal of Forensic Sciences

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There are many different fingermark visualization techniques available, and the choice of methodology employed may be dependent on the surface type. This comprehensive review of the scientific literature evaluates the methodologies of fingermark enhancement methods that are applicable to metallic surfaces; optical, physical, chemical, and physicochemical methods are critically discussed. Methods that are currently used and those that have the potential to reduce the cost and time required to process evidence and increase the recovery rates are considered and are assessed against the Centre for Applied Science and Technology (CAST) and the International Fingerprint Research Group (IFRG) guidelines. The use of chemical imaging techniques in particular has increased the potential to recover fingermarks of sufficient quality for identification purposes. Presently, there appears to be a lack of detailed research pertaining to validation and thorough casework studies for fingermark enhancement techniques. Further studies incorporating these guidelines are recommended.KEYWORDS: forensic science, fingermarks, fingerprints, enhancement techniques, metallic surfaces, latent fingermarks Fingermarks are considered one of the most valuable types of physical evidence recovered from a crime scene. Fingermark casework is still the most common casework for forensic scientists despite the increase in use of DNA (1) to identify/exonerate suspects via bodily fluids (2). The ridge patterns found in fingermarks are permanent and can be used to individualize or exclude suspects from an investigation.Detection of fingermarks on metallic surfaces will be dependent upon the compounds remaining from the fingermark residue. Several detailed reviews have already been published on fingermark composition, but none have focused on fingermarks deposited on metallic surfaces (3,4).Generally, there are two types of fingermarks found at crime scenes: visible fingermarks, usually formed by fingers contaminated by a substance such as oil, fruit, grease, paint or blood, which are deposited on a surface; and latent fingermarks, which are invisible to the naked eye and are the most abundant type of fingermarks at crime scenes. Metallic surfaces are also commonly encountered in crime scenes and are ubiquitous in the environment. Surfaces such as the door of a car, objects like handles, weapons, and tools are usually made of steel. Cartridge cases are frequently recovered from crime scenes and are usually made of brass or nickel (5). There are a number of different techniques that can be applied to a surface to visualize latent fingermarks. The selection of a suitable technique depends on different factors, such as the expected composition of a fingermark, the ability of the chosen technique to be used in tandem with other techniques, and the nature of the substrate. In this review, the focus will be on fingermarks deposited on metallic surfaces, and the optical, physical, chemical, and physicochemical visualization techniques that can be used ...

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“…Targeted development of fingerprint ridges, luminescent fingerprints and chemical probing are amongst the enhancements that can be achieved using nanoparticles (Zhao et al 2018;Li et al 2018). The nanoparticles exploited in fingerprint research include gold, silver, titanium dioxide, zinc oxide and silica nanoparticles (SNPs) (Becue et al 2007;Sodhi and Kaur 2017;Bergeron 2003;Becue et al 2008;Kim et al 2016;Newland et al 2016;Choi et al 2007;Choi et al 2008;Singh et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Fluorescent variant of silica nanoparticle powder synthesised from rice husk for latent fingerprint development

Rajan

Zakaria

Shamsuddin

et al. 2019

Egypt J Forensic Sci

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Background: Fingerprint, though still remains one of the best possible means of individual identification, is often lost during the recovery process. The successful utilisation of developed fingerprint for identification relies on the contrast between the ridges and substrate which allows for the minutiae recognition and characterisation. However, the contrast is difficult to be achieved on challenging or difficult surfaces such as reflective, multicoloured and patterned materials. Methodology: Silica nanoparticles (SNP) were synthesised from rice husk using thermochemical treatment and incorporated with natural dyes. The photoluminescence of the powders was recorded and characterised using field emission scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction analysis and forensic alternative light source. The effectiveness of three fluorescent variant of the SNP powders and commercial fluorescent powder (CFP) was investigated by developing latent fingerprints deposited on different multicoloured substrates. Results: Spherical fluorescent silica nanoparticles were successfully synthesised from rice husk. Characterisation studies of coloured silica nanoparticles showed amorphous spherical silica nanoparticle with a mean particle size of approximately 200 nm. Silica nanoparticle doped with curcumin pigment exhibited strongest fluorescence and good stability when exposed to heat and aged at room temperature. The efficiency of the coloured silica nanoparticle was not compromised by the dye doping process as determined using electron microscope and surface tests on various surfaces. Conclusion: Findings demonstrated that fluorescent silica powder synthesised from rice husk and curcumin dye extract exhibited good photoluminescence and hence providing sufficient contrast for the fingerprint analysis on difficult and challenging surfaces. Additionally, the spherical mono-dispersed nanoparticles enhanced the clarity and selectivity of the powder.

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Further investigations into the single metal deposition (SMD II) technique for the detection of latent fingermarks

Cited by 20 publications

References 31 publications

Investigation of some of the factors influencing fingermark detection

Investigation of some of the factors influencing fingermark detection

Detection of Fingermarks—Applicability to Metallic Surfaces: A Literature Review

Fluorescent variant of silica nanoparticle powder synthesised from rice husk for latent fingerprint development

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