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1.
Int J Legal Med ; 138(3): 1079-1084, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-37966516

RESUMEN

In forensic anthropology, the estimation of skeletal sex results in a dichotomous outcome: male or female. This poses challenges when dealing with transgender individuals. Italy has the highest rate per capita of transgender murders, making their identification a compelling issue. This study presents three cases of unidentified skeletal remains of transgender women (MtF) that underwent autopsies in the 1990s at the Institute of Legal Medicine of Milan. The transgender status of the individuals was determined from the autopsy records which indicated the co-existence of breast implants and male genitalia. The biological profile was created by estimating sex, age, ancestry, and stature, and the bones were investigated looking for evidence of Facial Feminization Surgery (FFS). Anthropological estimations revealed that the skeletons belong to male, adults, European individuals, between 164 and 184 cm. Fragmented gelatinous masses were found in association with two skeletons, which were interpreted as remnants of breast implants. In two cases, signs of remodeling of the cortical surface were observed on the zygomatic bones, although the bone marks observed here were not specific enough to link them to FFS. Despite some limitations, this study highlights the need for greater awareness among practitioners about this limitedly addressed issue, advocating for a more inclusive forensic anthropology that strives to improve methods and interpretation of evidence for the identification of transgender individuals.


Asunto(s)
Antropología Forense , Personas Transgénero , Adulto , Humanos , Masculino , Femenino , Antropología Forense/métodos , Restos Mortales , Huesos , Italia
2.
Int J Legal Med ; 138(2): 467-486, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-37775592

RESUMEN

Age estimation is crucial when the state of personhood is a mitigating factor in the identification of immature human remains. The maturation sequence of immature bones is a valuable alternative to dental development and eruption standards. Bordering the foramen magnum and pars basilaris, the pars lateralis is somewhat understudied. The aim of this study was to comprehensively describe the morphology of the immature human pars lateralis bone. Human pars laterali were sourced from the crania of 103 immature individuals of unknown provenance from the Johannesburg Forensic Paediatric Collection (JFPC), University of the Witwatersrand (HREC-Medical: M210855). The study sample was subdivided into early prenatal (younger than 30 gestational weeks; n = 32), prenatal (30-40 gestational weeks, n = 41) and postnatal (birth to 7.5 months, n = 30) age groups. The morphology of the pars laterali was studied using a combination of bone mineral density pattern assessments, geometric morphometrics and stereomicroscopy. Bone mineral density in postnatal individuals was lower when compared with the prenatal individuals. No statistically significant differences between density points were noted. The overall shape of the pars lateralis changed from a triangular shape in the early prenatal individuals to a fan-like quadrilateral bone in postnatal individuals. The angulation of the medial border for the foramen magnum highlighted a change in shape between straight in the early prenatal cohort to V-shaped in the postnatal individuals. The various technical approaches used in the current study provided detailed descriptions of the pars lateralis which establishes a valuable foundation for diagnostic criteria employing morphological predictors for biological profiling.


Asunto(s)
Porción Reticular de la Sustancia Negra , Embarazo , Femenino , Humanos , Niño , Densidad Ósea , Sudáfrica , Antropología Forense
3.
Int J Legal Med ; 2024 Apr 10.
Artículo en Inglés | MEDLINE | ID: mdl-38594499

RESUMEN

Forensic microbiology is rapidly emerging as a novel tool for human identification. The human microbiome, comprising diverse microbial communities including fungi, bacteria, protozoa, and viruses, is unique to each individual, offering a new dimension to forensic investigations. While traditional identification methods primarily rely on DNA profiling and fingerprint analysis, they face limitations when complete DNA or fingerprints profiles are unattainable or degraded. In this context, the microbial signatures of the human skin microbiome present a promising alternative due to their resilience to environmental stresses and individual-specific composition. This review explores the potential of microbiome analysis in forensic human identification, evaluating its applications, advantages, limitations, and future prospects. The uniqueness of an individual's microbial community, particularly the skin microbiota, can provide distinctive biological markers for identification purposes, while technological advancements like 16 S rRNA sequencing and metagenomic shotgun sequencing are enhancing the specificity of microbial identification, enabling detailed analysis of these complex ecological communities. Despite these promising findings, current research has not yet achieved a level of identification probability that could establish microbial analysis as a stand-alone evidence tool. Therefore, it is presently considered ancillary to traditional methods, contributing to a more comprehensive biological profile of individuals.

4.
Forensic Sci Med Pathol ; 20(1): 117-128, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-37084127

RESUMEN

Identification of subjects, including perpetrators, is one of the most crucial goals of forensic science. Saliva is among the most common biological fluids found at crime scenes, containing identifiable components. DNA has been the most prominent identifier to date, but its analysis can be complex due to low DNA yields and issues preserving its integrity at the crime scene. Proteins are emerging as viable candidates for subject identification. Previous work has shown that the salivary proteome of the least-abundant proteins may be helpful for subject identification, but more optimized techniques are needed. Among them is removing the most abundant proteins, such as salivary α-amylase. Starch treatment of saliva samples elicited the removal of this enzyme and that of glycosylated, low-molecular-weight proteins, proteases, and immunoglobulins, resulting in a saliva proteome profile enriched with a subset of proteins, allowing a more reliable and nuanced subject identification.


Asunto(s)
Proteoma , Almidón , Humanos , Proteoma/metabolismo , Almidón/metabolismo , Saliva , ADN , Ciencias Forenses
5.
Int J Legal Med ; 137(5): 1395-1405, 2023 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-37405514

RESUMEN

The identification of tissue origin of body fluid is helpful to the determination of the case nature and the reproduction of the case process. It has been confirmed that tissue-specific differential methylation markers could be used to identify the tissue origins of different body fluids. To select suitable tissue-specific differential methylation markers and establish the efficient typing system which could be applied to the identifications of body fluids in forensic cases involving Chinese Han individuals of young and middle-aged group, a total of 125 body fluids (venous blood, semen, vaginal fluid, saliva, and menstrual blood) were collected from healthy Chinese Han volunteers aged 20-45 years old. After genome-wide explorations of DNA methylation patterns in these five kinds of body fluids based on the Illumina Infinium Methylation EPIC BeadChip, 15 novel body fluid-specific differential CpGs were selected and verified based on the pyrosequencing method. And these identification efficiencies for target body fluids were verified by ROC curves. The pyrosequencing results indicated that the average methylation rates of nine CpGs were consistent with those of DNA methylation chip detection results, and the other five CpGs (except for cg12152558) were still helpful for the tissue origin identifications of target body fluids. Finally, a random forest classification prediction model based on these 14 CpGs was constructed to successfully identify five kinds of body fluids, and the tested accuracy rates all reached 100%.

6.
Naturwissenschaften ; 110(6): 55, 2023 Dec 04.
Artículo en Inglés | MEDLINE | ID: mdl-38047969

RESUMEN

Fingerprints have been widely used and accepted as an effective method of human identification. This biometric tool aids in criminal investigations for personal identity for over a century. Whilst the Automatic Fingerprint Identification System (AFIS) has bolstered security efforts, it has also opened doors to potential scams, affecting both civilian and law enforcement operations. Despite extensive research on fingerprint authentication issues, very little attention has been given to addressing the problem of fingerprint alteration or obfuscation. Fraudsters, with the guidance of experts, have developed new techniques to obscure their fingerprints intentionally. Fingerprint obfuscation is the deliberate alteration of fingerprint patterns with the aim of concealing their true identity, raising concerns amongst security and investigative organizations. The objective of the current communication is to highlight the numerous techniques used for obfuscation, forgery and alteration of fingerprints in humans. It further accentuates the need for identification and interpretation of these altered fingerprints and recommends notifying law enforcement agencies of potential threats.


Asunto(s)
Biometría , Dermatoglifia , Ciencias Forenses , Humanos
7.
Naturwissenschaften ; 110(4): 32, 2023 Jul 03.
Artículo en Inglés | MEDLINE | ID: mdl-37395867

RESUMEN

Estimation of sex holds great significance in the field of Forensic Science since it helps establish the identity of an individual during a crime scene investigation. Sex differences in human behaviour are the result of natural selection. Sexually dimorphic stimuli of cognitive and behavioural activities may influence the phenotypic expression of our motor skills. Human traits such as signatures and handwriting are phenotypic manifestation of these skills. These phenotypic biological and behavioural traits have inherent sexual dimorphism and may help to identify sex in different circumstances. For instance, to establish the sex of an individual or deceased, forensic samples of the human body such as voice samples, features of fingerprints and footprints, the skeleton, or its remains are helpful. Similarly, the sex of an individual may also be identified from their corresponding handwriting and signature. Handwriting experts can extract peculiar features from handwriting and signatures which could help establish whether the signatures belong to a male or a female. A female writer may have attractive, rounded, upright, tidy, skilled, well-formed strokes, artistic design, better penmanship, and greater length of the signature compared to the signature of a male. Here, we review the studies related to the identification of sex from signatures and handwriting and present inferences about vital features and methods of sex identification through handwriting. These mainly suggest that the accuracy of sex prediction from signature and handwriting ranges from 45 to 80%. We also present writing examples to show sex-based differences in the signature and handwriting of males and females. The female's handwriting is more decorative, arranged, aligned, neat, and clean as compared to that of the male. Based on the writing samples and the review of literature, we suggest that forensic handwriting experts may eliminate suspects based on the sex of the writer, which can simplify the identification process of disputed or questionable signatures and handwriting.


Asunto(s)
Ciencias Forenses , Escritura Manual , Masculino , Humanos , Femenino
8.
Proc Natl Acad Sci U S A ; 117(10): 5176-5183, 2020 03 10.
Artículo en Inglés | MEDLINE | ID: mdl-32094165

RESUMEN

A 2009 report by the National Academy of Sciences was highly critical of many forensic practices. This report concluded that significant changes and advances were required to ensure the reliability across the forensic sciences. We examine the reliability of one such forensic technique used for identification based on purported distinct patterns on the seams of denim pants. Although first proposed more than 20 years ago, no thorough analysis of reliability or reproducibility of this forensic technique has previously been reported. We performed a detailed analysis of this forensic technique to determine its reliability and efficacy.

9.
Int J Legal Med ; 136(5): 1469-1481, 2022 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-35394177

RESUMEN

Numerous intrinsic and extrinsic factors influence bone remodelling rates and have shown to affect the accuracy of histological aging methods. The present study investigates the rib cortex from two Mediterranean skeletal collections exploring the development of population-specific standards for histomorphometric age-at-death estimation. Eighty-eight standard ribs from two samples, Cretans and Greek-Cypriots, were processed histologically. Thirteen raw and composite histomorphometric parameters were assessed and observer error tested. The correlation between age and the parameters and the differences between sex and population subsamples were explored through group comparisons and analysis of covariance. General linear models assessed through data fit indicators and cross-validation were generated from the total dataset, and by sex and population subsamples. Most of the histological variables showed a statistically significant correlation with age with some differences observed by sex and by sample. From the twelve models generated, the optimal model for the whole sample included osteon population density (OPD), osteon perimeter, and osteon circularity producing an error of 10.71 years. When sex and samples were separated, the best model selected included OPD and osteon perimeter producing an error of 8.07 years for Greek-Cypriots. This research demonstrates the feasibility of quantitative bone histology to estimate age, obtaining errors rates in accordance with macroscopic ageing techniques. Sex and sample population differences need further investigation and inter-population variation in remodelling rates is suggested. Moreover, this study contributes to the creation of population-specific standards for Cretans and Greek-Cypriots.


Asunto(s)
Osteón , Costillas , Determinación de la Edad por el Esqueleto/métodos , Envejecimiento , Remodelación Ósea , Humanos , Modelos Lineales , Costillas/patología
10.
Acta Radiol ; 63(11): 1513-1521, 2022 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-34623180

RESUMEN

BACKGROUND: Nowadays, data on the anthropometric measurements of populations is needed in many areas, especially forensic and legal. Using various methods, researchers obtain various data such as race, sex, and age, and thus provide identification of the material used. Morphological or metric methods are often used for identification. PURPOSE: To evaluate the usefulness of the results of skull measurements using computed tomography (CT) to determine sex in a Turkish population. MATERIAL AND METHODS: We analyzed 300 male and 300 female CT images of Turkish individuals with an age range of 21-50 years. Maximum cranial length, maximum cranial breadth, bimastoid diameter, bizygomatic diameter, and bigonial breadth were measured by CT tomography. All data were subjected to discriminant function analyses for estimating sex. Intra-observer and inter-observer variances of the measurements were examined using intraclass correlation coefficient analysis. RESULTS: Discriminant function analysis indicated that there was a significant difference between male and female with 88% accuracy. Discriminant function for estimation of sex was obtained with satisfactory accuracy rates for the parameters used. CONCLUSION: This study confirms that skull measurements show sexual dimorphism in the Turkish population, and also suggests that it may be useful to use CT to assess skull anthropometric measurements.


Asunto(s)
Determinación del Sexo por el Esqueleto , Adulto , Análisis Discriminante , Femenino , Antropología Forense/métodos , Humanos , Masculino , Persona de Mediana Edad , Determinación del Sexo por el Esqueleto/métodos , Cráneo/diagnóstico por imagen , Tomografía Computarizada por Rayos X , Adulto Joven
11.
Fa Yi Xue Za Zhi ; 38(2): 166-172, 2022 Apr 25.
Artículo en Inglés, Zh | MEDLINE | ID: mdl-35899500

RESUMEN

At present, medical disputes are still widely-concerned social problems and occasionally evolve into severe social events. In the dispute settlement mechanism, forensic identification opinion is the important technical support. Due to the high professionalism and complexity of medicine, the identification of medical malpractice has become major and difficult problem in the identification. This paper systematically analyze the concept of medical malpractice and five legal theories of malpractice determination, pointing out that China's forensic identification of medical damage should be led by the theory of "medical standards", supplemented by "prudent patient" standard and strengthen "peer review" in form. At the same time, seven main identification principles should be followed in practice: (1) take "obligation of diagnosis and treatment" as the basic principle of medical malpractice identification; (2) take whether to fulfill the obligation of diagnosis and treatment corresponding to current medical level as the specific principle; (3) take diagnosis and treatment routine, norms and guidelines as the main basis; (4) the principle of "peer review"; (5) the principle of "the generality of medical emergency action"; (6) the principle of "notification-informed-consent"; (7) the principle of "review of complications". This paper also puts forward the corresponding identification ideas in view of the above principles, hoping this helps standardize medical damage forensic identification activities.


Asunto(s)
Mala Praxis , Disentimientos y Disputas , Medicina Legal , Humanos , Consentimiento Informado
12.
Fa Yi Xue Za Zhi ; 38(2): 173-181, 2022 Apr 25.
Artículo en Inglés, Zh | MEDLINE | ID: mdl-35899501

RESUMEN

On the basis of retaining the technical identification system of medical negligence, the Medical Association Identification Rules of Medical Damage mainly provides technical services for various types of conciliation work about doctor-patient dispute. Its identification work is still influenced by the thinking of medical negligence technical identification and has certain administrative color. Guidance for Judicial Expertise of Medical Malpractice is mainly reflected that the trial of civil cases and pre-trial mediation of courts need service. Its procedures and evidence review are strictly required by the litigation rules and has the characteristics of public legal services provided as a third-party neutral institution. Technical identification of medical damage, whether organized by the Medical Association or the forensic identification institutions, is carried out under the background of the current Regulations on the Prevention and Treatment of Medical Disputes and the Civil Code of the People's Republic of China; both have a corresponding positive role in regulating the medical damage identification activities, and have also laid a certain foundation for the establishment of a unified identification system in the future in China. To understand the different characteristics of the medical damage identification rules issued by the Chinese Medical Association and the Ministry of Justice, and to improve the understanding of the standardization of the forensic identification of medical damage, a comparative study was conducted on Medical Association Identification Rules of Medical Damage and Guidance for Judicial Expertise of Medical Malpractice from seven aspects: Concept and legal status, entrust of identification, identification acceptance, identification procedures, identification presentation meeting, theory of medical malpractice evaluation, consequences and causality of medical damage. The subject of evaluation, the function of evidence review, the role of consulting experts, the technical standard system of malpractice evaluation and other contents were emphatically analyzed.


Asunto(s)
Mala Praxis , China , Medicina Legal , Humanos
13.
Int J Legal Med ; 135(4): 1437-1447, 2021 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-33987742

RESUMEN

Organophosphorus pesticides (OPS) are widely used in the world, and many poisoning cases were caused by them. Phorate intoxication is especially common in China. However, there are currently few methods for discriminating phorate poisoning death from phorate exposure after death and interpretation of false-positive results due to the lack of effective biomarkers. In this study, we investigated the metabonomics of rat plasma at different dose levels of acute phorate intoxication using ultra-performance liquid chromatography quadrupole-time of flight mass spectrometry (UPLC-Q-TOF-MS) analysis. A total of 11 endogenous metabolites were significantly changed in the groups exposed to phorate at LD50 level and three times of LD50 (3LD50) level compared with the control group, which could be potential biomarkers of acute phorate intoxication. Plasma metabonomics analysis showed that diethylthiophosphate (DETP) could be a useful biomarker of acute phorate intoxication. The levels of uric acid, acylcarnitine, succinate, gluconic acid, and phosphatidylcholine (PC) (36:2) were increased, while pyruvate level was decreased in all groups exposed to phorate. The levels of ceramides (Cer) (d 18:0/16:0), palmitic acid, and lysophosphatidylcholine (lysoPC) (18:1) were only changed after 3LD50 dosage. The results of this study indicate that the dose-dependent relationship exists between metabolomic profile change and toxicities associated with apoptosis, fatty acid metabolism disorder, energy metabolism disorder especially tricarboxylic acid (TCA) cycle, as well as liver, kidney, and nervous system functions after acute exposure of phorate. This study shows that metabonomics is a useful tool in identifying biomarkers for the forensic toxicology study of phorate poisoning.


Asunto(s)
Metaboloma , Metabolómica , Intoxicación por Organofosfatos/sangre , Intoxicación por Organofosfatos/metabolismo , Forato/sangre , Forato/metabolismo , Animales , Biomarcadores/sangre , Biomarcadores/metabolismo , Cromatografía Líquida de Alta Presión , Modelos Animales de Enfermedad , Dosificación Letal Mediana , Espectrometría de Masas , Ratas
14.
Int J Legal Med ; 135(4): 1319-1327, 2021 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-33880634

RESUMEN

When decomposition of a recovered body is fairly advanced, identification based on common morphologic features is often impossible. In these cases, short tandem repeat (STR) marker genotyping has established itself as a convenient and reliable alternative. However, at very progressed stages of decomposition, postmortem tissue putrefaction processes can decrease DNA yields considerably. Hence, not all types of tissue are equally suitable for successful STR marker-based postmortem identification. Bone or dental material is often analysed in corpses with advanced decompositional changes. However, processing of these materials is very elaborate and time and resource consuming. We have therefore focused on the suitableness of various types of soft tissue swabs, where DNA extraction is easier and faster. By sampling 28 bodies at various stages of decomposition, we evaluated the suitability of different tissues for genotyping at varying degrees of physical decay. This was achieved by a systematic classification of the sampled bodies by morphological scoring and subsequent analysis of multiple tissue swabs of the aortic wall, urinary bladder wall, brain, liver, oral mucosa and skeletal muscle. In summary, we found variable degrees of suitability of different types of soft tissue swabs for DNA-based identification. Swabs of the aortic wall, the urinary bladder wall and brain tissue yielded the best results - in descending order - even at advanced levels of decay.


Asunto(s)
Restos Mortales/química , ADN/aislamiento & purificación , Antropología Forense/métodos , Aorta/química , Química Encefálica , Degradación Necrótica del ADN , Dermatoglifia del ADN/métodos , Femenino , Humanos , Hígado/química , Masculino , Repeticiones de Microsatélite , Mucosa Bucal/química , Músculo Esquelético/química , Cambios Post Mortem , Vejiga Urinaria/química
15.
Int J Legal Med ; 135(5): 1993-2001, 2021 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-33890165

RESUMEN

The anatomical uniqueness of the frontal sinus morphology has been widely used for comparative forensic identification using various techniques, mostly including 2D X-rays or one fixed slice of an axial computed tomography (CT) scan image. However, computer-aided 3D automatic graphical comparison techniques can provide accurate comparisons between two 3D models that allow users to comply with even the strictest deviation standards, avoiding error-prone identification of frontal sinuses with similar morphologies. The study proposes the use of a computer-aided comparative paradigm based on the 3D-3D frontal sinus model superimposition process and further assesses the anatomical uniqueness of frontal sinuses using a large Chinese Han sample. Three hundred thirty-six patients older than 20 years with two multi-slice CT scans were collected. Frontal sinus 3D models were semi-automatically segmented through Dolphin Imaging software. Automatic pairwise comparisons of 336 matched pairs from the same person and 340 mismatched pairs from different individuals with an analysis of average root mean square (RMS) point-to-point distance were performed using Geomagic Studio Qualify software. RMS ranged between 0.005 and 1.032 (mean RMS 0.390 ± 0.25 mm) in the group of matches and between 1.107 and 19.363 (mean RMS 4.49 ± 2.69 mm) in the group of mismatches. On average, the RMS value was over ten-fold greater in mismatches than in matches. Statistically significant differences in RMS between the group of matches and mismatches were assessed using the Mann-Whitney U test (p < 0.05). This study supports the value of the frontal sinus with a 3D computer-aided superimposition method for human identification with large samples when DNA, fingerprints, and dental materials are not accessible.


Asunto(s)
Antropología Forense/métodos , Seno Frontal/anatomía & histología , Seno Frontal/diagnóstico por imagen , Procesamiento de Imagen Asistido por Computador/métodos , Imagenología Tridimensional/métodos , Adulto , Pueblo Asiatico , China , Femenino , Humanos , Masculino , Persona de Mediana Edad , Tamaño de la Muestra , Programas Informáticos
16.
Hum Biol ; 93(2): 105-123, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-37733461

RESUMEN

The 1943 Battle of Tarawa resulted in the loss of approximately 1,000 US service members on or around Betio Island, Tarawa Atoll, Republic of Kiribati. Nearly half these casualties were accounted for after the battle. The Defense POW/MIA Accounting Agency (DPAA) has worked to identify the remaining ∼510 unaccounted-for service members and has successfully identified ∼160 service members to date. Demographic data pulled from historical documentation of the US losses indicate a relatively homogeneous population (99% White, 81% 17-23 years of age, and only two individuals with a documented religious preference other than Protestant or Catholic). Using this demographic data as a framework, three case studies are presented to demonstrate how a holistic biosocial approach to building identity could facilitate forensic identifications. The temporal and sociocultural contextualization of analyses enables anthropologists to navigate inconsistencies between 21st-century and historical (1940s) social identity concepts to overcome challenges to identification. The case studies demonstrate how biological evidence, genetic evidence, and material evidence (material culture) differently contribute to the social identity of an individual and can impact identification efforts when analytical conclusions are incongruent with historical documentation. The first case of US Battle of Tarawa casualties examines how morphometric biological affinity assessments are biased by the fluidity of social identity concepts when complex morphological and metric indicators of biological affinity are not represented in historical race categories. The second case demonstrates how biogeographic genetic affinity predictions, through a discussion of the G2a4 haplogroup, need to be examined holistically in the context of other lines of evidence. The third case highlights how material evidence can further define social identity beyond physicality, genetic structure, and race. The challenges of interpreting identity from human remains, as highlighted through these examples, are commonly encountered by anthropologists working in disaster victim identification and other humanitarian contexts. Thus, it is imperative for anthropologists to be self-aware of implicit biases toward the current prevailing definitions of biological and social identity and to consider historical perceptions of identity when working in these contexts.


Asunto(s)
Víctimas de Desastres , Segunda Guerra Mundial , Humanos , Sesgo Implícito , Documentación , Etnicidad
17.
Hum Biol ; 93(1): 33-50, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-35338701

RESUMEN

The humanitarian crisis on the US-Mexico border is a long-standing and evolving crisis in which nearly 8,000 deaths have been reported in the last two decades. These deaths are largely distributed across the Arizona-Mexico and Texas-Mexico border regions, where demographic trends for immigrants attempting to cross into the United States have shifted dramatically. The demographic change and volume of immigrants seeking shelter in the United States present new challenges for the forensic practitioners entrusted with the identification of individuals who lose their lives during the final segment of their journey. Within this border context, this study investigated how genetic variation inferred from forensically significant microsatellites can provide valuable information on regions of origin for unidentified remains at the group level. To explore how to mobilize these genetic data to inform identification strategies, the authors conducted a comparative genetic analysis of identified and unidentified immigrant cases from the Arizona- and Texas-Mexico contexts, as well as 27 other Latin American groups. Allele frequencies were utilized to calculate FST, and relationships were visually depicted in a multidimensional scaling plot. A Spearman correlation coefficient analysis assessed the strength and significance of population relationships, and an agglomerative clustering analysis assessed population clusters. Results indicate that Arizona-Mexico immigrants have the strongest relationship (>80%) with groups from El Salvador, Guatemala, Mexico, and an indigenous group from southern Mexico. Texas-Mexico immigrants have the strongest relationships (>80%) with groups from Belize, Colombia, Costa Rica, El Salvador, Guatemala, Honduras, and Nicaragua. These findings agree with, and are discussed in comparison with, previously reported demographic trends, population genetics research, and population history analyses. The authors emphasize the utility and necessity of coupling genetic variation research with a nuanced anthropological perspective for identification processes in the US-Mexico border context.


Asunto(s)
Emigrantes e Inmigrantes , Genética de Población , Hispánicos o Latinos , Arizona , Variación Genética , Hispánicos o Latinos/genética , Humanos , América Latina , México , Texas , Estados Unidos
18.
Int J Legal Med ; 134(3): 1185-1193, 2020 May.
Artículo en Inglés | MEDLINE | ID: mdl-31446459

RESUMEN

Dental development and eruption sequences have prevailed as the gold standard in age estimations of previously unidentified immature individuals within a legal context. However, in the absence of the dentition, skeletal assessments have served as a frequently applied alternative. While various cranial and postcranial skeletal elements have been used in estimating age of the immature skeleton, little is known about the anthropometric value of the pars basilaris, pars lateralis and femur as skeletal age estimation tools. Thus, this study aimed to assess if these bones of the immature human skeleton were useful elements in estimating the age of prenatal and postnatal individuals. These bones were excised from the remains of 74 unclaimed human immature individuals and evaluated using traditional anthropometric methods. The study sample was sourced from the Johannesburg Forensic Pathology Services (JFPS) and the Johannesburg Forensic Paediatric Collection (JFPC), University of the Witwatersrand and subdivided into an early prenatal (younger than 30 gestational weeks); late prenatal (30 to 40 gestational weeks) and postnatal (birth to 7.5 months) age ranges. Statistically significant differences (p ≤ 0.05) were found when assessing the maximum length, sagittal length, maximum width and distal width of the bones across each of the age ranges (30 gestational weeks to 7 postnatal months). The cranial and postcranial skeletal elements investigated in this study provide a valuable contribution to skeletal ageing in African individuals.


Asunto(s)
Determinación de la Edad por el Esqueleto , Prosencéfalo Basal/crecimiento & desarrollo , Fémur/crecimiento & desarrollo , Edad Gestacional , Porción Reticular de la Sustancia Negra/crecimiento & desarrollo , Antropometría/métodos , Femenino , Antropología Forense/métodos , Patologia Forense/métodos , Humanos , Lactante , Recién Nacido , Masculino , Embarazo , Sudáfrica
19.
Stomatologiia (Mosk) ; 99(1): 43-48, 2020.
Artículo en Ruso | MEDLINE | ID: mdl-32125301

RESUMEN

AIM: The identification of personality based on dental status of the remains of presumably Evgenii Sergeevich Botkin physician-in-ordinary of the family of the Nicholas II. We examined the scull #2 (presumably attributed to Tsar's family physician-in-ordinary E.S. Botkin) fragments of edentulous maxilla and mandible in particular, 2 stereolithographic resin models of full dentures belonged to Botkin E.S. We utilized the following examination methods: Visual evaluation (odontoscopy, morphoscopy) Anthropometric analysis (odontometric and morphometric) 3D digital scanning of the studied objects Manual and digital superimposition of their contours Digital scanning was performed with the use of optical scanner device Neway Scanway 2017 12 REV C and also with NobelProcera 2G scanner. Outline superimposition was performed with Nobel Procera Software v3.1, Exocad 2.2, Romexis ver. 4.5.1. CBCT of the objects was acquired on Planmeca Promax 3D Mid. Results of the current investigation prove the congruency and conformity of the dentures to the bony remains of the jaws and with high probability confirm the assumption of the appurtenance of the examined copy of the denture to the dentoalveolar system of the described scull #2 and the object itself - identified as the scull of the physician-in-ordinary to the last Russian Royal family Evgenii Sergeevich Botkin.


Asunto(s)
Dentadura Completa , Dentadura Parcial , Diseño Asistido por Computadora , Mandíbula , Maxilar , Federación de Rusia
20.
Int J Legal Med ; 133(1): 277-287, 2019 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-29666997

RESUMEN

The terrorist attack of July 14, 2016 in Nice (France) was a devastating event. A man voluntarily drove a truck into a crowd gathered for the fireworks display on the seaside "Promenade des Anglais," plowing pedestrians down over more than 2 km before being shot dead. At the time of this report, a total of 86 casualties and more than 1200 formal complaints for physical and psychological injuries have been recorded. The aim of this work is to describe the forensic management of this event and its immediate aftermath. This paper reaffirms the basic tenets of disaster management: a single place of work, teamwork in times of crisis, a single communication channel with families and the media, and the validation of the identifications by a multidisciplinary commission. This paper highlights other essential aspects of the organization of the forensic effort put in place after the Nice attack: the contribution of the police at the crime scene, the cooperation between the disaster victim identification (DVI) team, and the forensic pathologists at the morgue, applying the identification (ID) process to unconscious victims in the intensive care unit, the input of volunteers, and the logistics associated with the management of the aftermath of the event. All of the victims were positively identified within 4 and a half days. For the first time in such a paper, the central role of medical students in the immediate aftermath of the disaster is outlined. The need to address the possible psychological trauma of the non-medical and even the medical staff taking part in the forensic effort is also reaffirmed.


Asunto(s)
Víctimas de Desastres , Desastres , Ciencias Forenses/organización & administración , Terrorismo , Autopsia , Restos Mortales , Conducta Cooperativa , Francia , Humanos , Relaciones Interprofesionales , Morgue , Policia , Tomografía Computarizada por Rayos X
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