Uncertainty about the true source. A note on the likelihood ratio at the activity level

This paper focuses on likelihood ratio based evaluations of fibre evidence in cases in which there is uncertainty about whether or not the reference item available for analysis - that is, an item typically taken from the suspect or seized at his home - is the item actually worn at the time of the offence. A likelihood ratio approach is proposed that, for situations in which certain categorical assumptions can be made about additionally introduced parameters, converges to formula described in existing literature. The properties of the proposed likelihood ratio approach are analysed through sensitivity analyses and discussed with respect to possible argumentative implications that arise in practice.     

Identification from Chest X‐Rays: Reliability of Bone Density Patterns of the Humerus*

Abstract: A critical review of Kahana and Hiss’ study on identification from bone trabecular pattern and a test of their method conducted on the humerus are presented. Bone trabecular pattern was studied through the generation of a numerical file representing the gray scale. Using the correlation coefficient, several pairwise comparisons between numerical files were performed. The test gave nearly 30% of incorrect exclusions (the method did not recognize couples of radiographs belonging to the same subject) and 50% of misidentifications (the method recognized couples of radiographs belonging to different subjects, as belonging to the same subject); therefore, this research shows that at the present time, it is not possible to safely quantify identification through bone density patterns, of the proximal humerus taken from thoracic X‐rays. Thus, an “easy”—but dangerous—use of trabecular density patterns on this specific type of radiogram as an identification method should be currently avoided.     

“Tampering to Death”: A Fatal Codeine Intoxication Due to a Homemade Purification of a Medical Formulation

Many homemade tamper processes of medical codeine formulations are available on selected “forums” on the Internet, where recreational codeine users claim to be able to purify codeine by removing additives, such as acetaminophen, to avoid or limit adverse effects. In this work, it is reported and discussed a fatal case of codeine intoxication. The findings of objects such as jars, filters, and tablets, and amounts of unknown liquid material at the death scene investigation suggested a fatal codeine intoxication after the tampering procedure called “cold water extraction.” Toxicological results obtained from the analysis of both the nonbiological material and the body fluids of the decedent integrated with the information collected at the death scene investigation confirmed the above‐mentioned hypothesis. This report underlines the importance of a tight interconnection between criminalistics and legal medicine to strengthen the identification of the cause of death and the reconstruction of the event.     

An Early Indian Interpretive Puzzle: Vedic Etymologies as a Tool for Thinking

Etymologies are often encountered in Vedic prose, in Brāhma?as and early Upani?ads. Though they have received a fair amount of scholarly attention, Vedic etymologies still present a challenge to interpreters. To respond to it, I critically review previous interpretations, and focus on three case studies, Aitareya Brāhma?a 1.1.2, B?hadāra?yaka Upani?ad 1.3, and Chāndogya Upani?ad 6.8. In my interpretation, I emphasize the need for a contextual reading, foreground Vedic etymologies’ complexity and sophistication, and call attention to the variety of purposes they serve to achieve as well as to Vedic etymologists’ agency. Supplementing conventional interpretations concentrating mostly on their religious-magical aspects, I describe Vedic etymologies as discursive devices used by Vedic authors to further their thoughts and agendas.     

Evaluation of scientific evidence using Bayesian networks

Bayesian networks provide a valuable aid for representing epistemic relationships in a body of uncertain evidence. The paper proposes some simple Bayesian networks for standard analysis of patterns of inference concerning scientific evidence, with a discussion of the rationale behind the nets, the corresponding probabilistic formulas, and the required probability assessments.     

Deaths associated with electric shock injuries in children and adults: A 10-year retrospective examination in Şanlıurfa,Southeast Turkey (2012–2022)

Electric shock injuries (EIs) have high rates of morbidity and mortality in both children and adults. The aim of this study was to examine autopsy cases resulting from EIs and to compare pediatric and adult groups with respect to sociodemographic data, clinical characteristics, location of the incident, electricity entry–exit wound characteristics, current direction, pathological effects of the electric shocks on the body, and cause of death. A total of 8075 autopsies conducted between 2012 and 2022 were retrospectively examined. Şanliurfa is a city in the southeast of Turkey with the highest birth rate in the country. Of 123 cases of death resulting from EIs in Şanliurfa, 58 (47.2%) were children (age < 18 years). In the majority of children (81%), a low-voltage injury resulted from a domestic appliance while the children were playing at home in a rural area. In the vast majority of adults, a high-voltage injury (HVI) resulted from a workplace accident due to working with HVI materials in an area outside the home. The manner of death was accidental in all the electric shock injuries. The electricity entry and exit wounds formed as a result of EIs had similar characteristics in both children and adults, with no significant difference identified. In the province of Şanliurfa, Turkey, which borders Syria and where the main occupation is agricultural activities, there is a need to increase electrical safety precautions within the home, educate parents, and increase electrical safety conditions and worker education in the workplace.     

An unusual case of a triple suicide pact at the time of the COVID-19 pandemic

In December 2020, the World Health Organization (WHO) declared SARS-CoV2 a global pandemic. Home confinement, low social contacts, and fear of virus transmission played a major role as risk factors for suicides during the following period. Suicide pacts, in particular, showed a different pattern. A rare case of a triple suicide pact among members of the same family nucleus is presented. The victims were an elderly, severely ill woman and her adult children (a son and daughter), linked by a morbid relationship. The last time the family was seen alive was 40 days before the discovery. All corpses presented decompositional changes. After a full autopsy, the cause of death was determined to be a lethal intake of morphine for the mother and acute blood loss due to self-stabbing at the neck for the siblings. The younger woman was under the effects of a large amount of heparin. Toxicological analysis was positive for opioids and alcohol in both siblings. Suicide pacts have rarely been described during the COVID-19 pandemic. In the few cases reported, the victims were more often relatives than people in a romantic relationship. The involvement of three people is unusual, as is the use of different suicide methods among the victims. In the presented case, the elderly mother's imminent death from terminal cancer, her concern over dying in a nondomestic environment, and the siblings' fear of being alone likely led to the conception of the suicide pact. Social isolation and economic difficulties also played a contributing role.     

Knowledge of child abuse and neglect in nursing students: Assessment and perspectives

Misdiagnosis of child abuse and neglect can delay early treatment. Some authors have pointed out that nurses can miss child abuse and neglect diagnoses due to a lack of knowledge. It is unclear whether the lack of knowledge is due to students' insufficient preparation in nursing school and/or a deficiency in continuing education. An 18-item questionnaire was administered to final-year nursing students to assess their degree of knowledge on child abuse and neglect and to evaluate if the lack of knowledge was due to insufficient teaching/training during nursing school. The students were also asked to evaluate themselves by assigning a score to their knowledge. A statistical comparison was performed to define whether sufficient/insufficient results were associated with the following variables: sex, pediatric or general nursing student, attending pediatric lectures, training in pediatric wards/ambulatories, and attending specific lectures on child abuse and neglect. The study population comprised 175 students (154 females, 20 males, 1 unknown). Exactly 66.3% of the participants had ≤9/18 correct answers. Of all students, 77.7% self-evaluated their level of knowledge as ≤5/10. The comparisons yielded statistically significant differences between the groups with sufficient objective knowledge and those unrelated to training in pediatric wards/ambulatories or pediatric nursing students. Overall, there was little objective knowledge on the subject, which may be related to insufficient teaching/training in nursing schools. Useful corrective strategies include further teaching on child abuse and neglect, preferably using a practical approach. Further, common teaching/training programs should be conducted by both pediatric and general nursing schools.