Development of dry-origin latent footwear impression on non-porous and semi-porous surfaces using a 5-methylthioninhydrin and L-alanine complex

Hong, Sungwook; Kim, Yeounjeung; Park, Jihye; Lee, Hoseon

doi:10.5806/ast.2017.30.2.75

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…At indoor crime scenes, 2D traces form the bulk of the evidence and may be either visible or latent [4]. Hong et al [5] state that most impressions found at crime scenes are latent. Three‐dimensional impressions can be found at indoor crime scenes in discarded/spilt food items, on paper towels, body parts, and as latent traces in carpet.…”

Section: Introductionmentioning

confidence: 99%

Recovery via SfM photogrammetry of latent footprint impressions in carpet

Larsen

Budka

Bennett

2021

Journal of Forensic Sciences

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Footwear outsole impressions are some of the most common types of trace evidence across a range of crime scene types in Europe and the USA [1][2][3]. The type of evidence falls into two broad categories, either two-dimensional or three-dimensional impressions and the latter are sometimes referred to as plastic traces [3]. At indoor crime scenes, 2D traces form the bulk of the evidence and may be either visible or latent [4]. Hong et al. [5] state that most impressions found at crime scenes are latent. Three-dimensional impressions can be found at indoor crime scenes in discarded/spilt food items, on paper towels, body parts, and as latent traces in carpet. It is the potential for 3D latent carpet traces which form the focus of this technical note.Footwear outsole impressions, and bare footprints, are common at crime scenes especially those where bodily fluids have been tracked around a location by either a victim or assailant [6][7][8][9]. Discussion of 3D versions of these traces, in materials such as carpets, is currently limited to that by the footwear expert William Bodziak in his seminal book [6]. He categorizes all outsole impressions by their level of permanency and goes on to state that depressed carpet may remain visible; however, is "usually of little value beyond indicating some general size, shape and design features of the suspect's footwear and the areas where the suspect(s) walked." He states that photography is the only way to recover this type of impression but does also discuss the use of electrostatic lifting for a 2D context. The use of ultraviolet crime lights or oblique lighting may help reveal such traces and aid photography. With the increasing availability of Structure from Motion (SfM) photogrammetry [10,11], 3D recovery of these latent carpet traces is now possible and our aim here is to illustrate this

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Section: Introductionmentioning

confidence: 99%