Browsing by Author "Villoria-Rojas, Catherine"

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    Dismemberment as a method of body disposal in Spanish forensic cases
    (MDPI, 2022-07-11) Mata-Tutor, Pilar; Villoria-Rojas, Catherine; Benito-Sánchez, María; Marquez-Grant, Nicholas
    This study provides an overview of victim and offender data, the cause and manner of death, the dismemberment type, the post-dismemberment alteration, and the forensic investigation, for 35 Spanish forensic cases. The main aim of this study was to perform a retrospective analysis of dismemberment and body part alteration in Spain since 1990, in particular relating to burning. The sample was selected from a Spanish national database on criminal records (CENDOJ). Official court records were examined for 96 variables, which were analysed through non-metric multidimensional scaling analysis (nMDS). The results obtained revealed that the number of dismemberment cases between 1990 and 2016 totalled 35 (amounting to a total of 40 bodies) with an incidence of 0.29% of the total number of homicide cases in the database. Most of the aggressors were Spanish adult males, and the victims were adult females of foreign nationality. The most commonly employed tool used to kill and dismember was the knife. A total of 15.00% of the 40 bodies were further altered by fire. It was concluded that dismemberment and other postmortem actions contributed to complicating the forensic investigation and hindering the identification of the deceased.
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    Measuring dimensional and morphological heat alterations of dismemberment-related toolmarks with an Optical Roughness-meter
    (Springer, 2021-07-05) Mata Tutor, Pilar; Villoria-Rojas, Catherine; Márquez-Grant, Nicholas; Alvarez de Buergo Ballester, Mónica; Pérez-Ema, Natalia; Benito-Sánchez, María
    This experimental study provides a further understanding of the post-burning nature of sharp force trauma. The main objective is to analyse the distortion that fire may inflict on the length, width, roughness, and floor shape morphology of toolmarks induced by four different implements. To this end, four fresh juvenile pig long bones were cut with a bread knife, a serrated knife, a butcher machete, and a saw. A total of 120 toolmarks were induced and the bone samples were thus burnt in a chamber furnace. The lesions were analysed with a 3D optical surface roughness metre before and after the burning process. Afterwards, descriptive statistics and correlation tests (Student’s t-test and analysis of variance) were performed. The results show that fire exposure can distort the signatures of sharp force trauma, but they remain recognisable and identifiable. The length decreased in size and the roughness increased in a consistent manner. The width did not vary for the saw, serrated knife, or machete toolmarks, while the bread knife lesions slightly shrunk. The floor shape morphology varied after burning, and this change became more noticeable for the three knives. It was also observed that the metrics of the serrated knife and machete cut marks showed no significant variations. Our results demonstrate that there is a variation in the toolmark characteristics after burning. This distortion is dependent on multiple factors that influence their dimensional and morphological changes, and the preservation of class features is directly reliant upon the weapon employed, the trauma caused, and the burning process conditions.