Documenting Skeletal Scatters in Obstructed Wooded Environments Using Close-Range Photogrammetry

Forensic scenes involving human skeletal remains in obstructed wooded environments are challenging to document. One potential solution is to document the scene in 3D utilizing close-range photogrammetry (CRP). This method enables the generation of realistic 3D models and accurate plan-view maps of the scene. The purpose of this research was to explore the use of CRP to preserve contextual information of simulated scenes involving scattered human remains in obstructed wooded environments. The main goal was to improve CRP methodology as well as demonstrate how to incorporate this method into the forensic archaeology documentation protocol. Two large skeletal scatters were documented to test the capabilities of CRP in an obstructed environment. Photographs were collected freehand and 3D models were processed using Agisoft Metashape Professional. Accuracy was assessed through visual analysis, root-mean square (RMS) reprojection errors, and total scale bar errors. While visual errors were present when zoomed in, the RMS reprojection and scale bar errors still indicated highly accurate models. However, the wooded environment presented numerous challenges that made utilizing CRP more difficult. Therefore, guidelines were outlined for documenting skeletal scatters in wooded environments using CRP, with a focus on addressing variables that can affect image quality. Overall, CRP is a viable method for documenting complex scenes in wooded environments which should be incorporated into forensic archaeological protocols.

Use of GIS in Forensic Archaeology to Search Clandestine Graves in Uruguay

In the context of the search of detainee disappeared from the dictatorship occurred in Uruguay, forensic archaeology uses GIS as an auxiliary tool which allows to create, edit, visualize, store, analyse and publish geospatial data and information related to the investigation process. The tools of GIS are described in this article to show the results and information obtained which are going to be useful in the analytic processes leading to the design of new search strategies and archaeological intervention according to the available resources for this context. Two case studies are presented with the purpose to show the use of QGIS as a result of the three main areas of work: preliminary, fieldwork and laboratory. QGIS is presented as one of the most versatile, dynamic and accessible tool to investigate the search of detainee disappeared in Uruguay.

An Overview of Three Dimensional (3D) Technologies in Forensic Odontology

Three-dimensional (3D) modalities are frequently applied in forensic practice as it tends to give complete information of the evidence merely by touching which has resulted in increased usage in legal medicine and forensic sciences. A number of sub-disciplines of forensic science utilises 3D modalities in an inter-disciplinary manner viz. forensic anthropology, forensic archaeology, forensic odontology, crime-scene investigation, pattern analysis and recovery, courtroom visualisation and ballistic comparison. With appropriate knowledge and utilisation of 3D scanning, modelling and printing technologies, innovative approaches can be implemented for identification in forensic cases. Given that these technologies are evolving rapidly and changing the face of forensic science, the present article collates current developments, working and applications of non-contact scanning techniques, modeling and 3D printing techniques.