Journal of forensic and legal medicine最新文献

Background

Needle pricking, the act of being intentionally pricked by an assailant, and needle spiking, the covert injection of substances using a needle, have historical precedents and recently resurfaced in Europe in 2022. This resurgence presented a challenge for emergency and forensic medicine departments.

Methods

We conducted a retrospective study in the forensic medicine department of Paris, France, including all patients who consulted for suspected needle pricking/spiking in 2022, following a police report. The study aimed to provide epidemiological data on victims, circumstances, and the results of toxicologic and serological analyses.

Findings

Of all assault victims in 2022, patients reporting or suspecting needle pricking/spiking represented 1.2 % of the total (171 cases). Most cases involved women (81.9 %) with a median age of 21.75 years. Incidents often occurred in festive contexts (84.8 %). Over a third of the patients didn't report any symptoms (37.5 %). Amnesia, nausea, and dizziness were common symptoms among those who did. Patients reporting alcohol consumption were more likely to experience symptoms (p < 0.05). Over half of the patients displayed physical examinations consistent with needle pricking, with pricks mostly on their arms. Not all patients underwent toxicologic analyses (30.6 %), but all results were negative. Despite most patients not providing follow-up serology results, all received results were negative.

Interpretation

Overall, our data are more suggestive of needle pricking than spiking. Although women were overrepresented, there was no evidence of sexual motivation on the part of the perpetrators. It's possible that the perpetrators wanted to instill fear in the population without a specific goal. This form of violence necessitates preventive measures in festive venues and enhanced efforts to detect psychoactive substance.

Background

The assessment of the postmortem interval (PMI) represents one of the major challenges in forensic pathology. Because of their stability, microRNAs, or miRNAs, are anticipated to be helpful in forensic research.

Objective

To see if estimation of PMI is possible using miRNA-21 and Hypoxia-inducible factor-1α (HIF-1α) expression levels in the heart samples from aluminum phosphide toxicity (Alpt).

Methods

This was a cross sectional study on 60 post-mortem samples (heart tissues) collected at different intervals during forensic autopsies. The two groups were allocated equally according to the cause of death into Group I (non-toxicated deaths, n = 30): Deaths caused by other than toxicity, and Group II (toxicated deaths, n = 30): Deaths due to Alpt. MDA (Malondialdehyde) and GSH (Glutathione), were measured in heart tissues using ELIZA. MiRNA- 21and HIF-1α expression levels were measured in heart tissues at different PMI using RT-Q PCR. ROC curve for detection of toxicated deaths using miRNA-21 and HIF was carried out.

Results

miRNA-21 and HIF-1α expression levels in Alp deaths were up regulated while GSH was downregulated with statistically significant difference. There was positive correlation between miRNA-21, HIF-1α and MDA with PMI while there was negative correlation between GSH and PMI in Alp deaths. In prediction of post mortem interval in Alp deaths miRNA-21 sensitivity and specificity were (75.9 %, 51.7 %, respectively) while HIF-1α sensitivity and specificity were 100 %.

Conclusion

PMI can be calculated using the degree to which particular miRNA-21 and HIF-1α are expressed in the heart tissue. The combination of miRNA-21 with HIF-1α in post mortem estimation is precious indicators.

Background

Sexual assault (SA) is alarmingly prevalent, yet reporting rates remain disproportionately low. Forensic examinations (FE) play a crucial role in both immediate medical care and evidence collection, yet many victims/survivors may not report the crime initially, leading to the loss of vital forensic evidence. The storage of evidence “Option 3″ care alternative provides post-SA care including FE without initial police involvement.

Methods

This is a cross-sectional study analysing the attendances of people who chose to store evidence at the Dublin Sexual assault Treatment Unit (SATU) between January 1, 2017 and December 31, 2023.

Results

There were 238 storage of evidence FEs (‘Option 3’) performed during the study period, which represented 12.8 % of all FEs. The majority identified as female (89.1 %), with an average age of 26.6 years. 31.9 % attended within 24 h of the incident, and 51.3 % self-referred. Most assaults occurred over weekends (64.7 %), with alcohol consumption reported in 82.2 % of cases and drug-facilitated SA concerns in 20.2 %. Genital injuries were present in 17.9 % of females and 19 % of males.

Those that availed of storage of evidence (compared with those who initially reported to the police) were significantly more likely to have consumed alcohol (p < 0.001) and the assault was more likely to have occurred indoors (p = 0.002). There was no significant difference in care option choice for those ‘unsure’ of the assault occurrence (p = 0.353).

Among storage of evidence cases, 20.2 % subsequently reported to the police, with females more likely to report (p = 0.02), while people who were uncertain whether an assault had occurred were less likely to report (p = 0.04). Genital injury (p = 0.822), victim-assailant relationship (p = 0.465), assault location (p = 0.487), and substance consumption (p = 0.332) did not significantly affect subsequent reporting rates.

Conclusions

The availability of storage of evidence has afforded people the opportunity to access prompt, responsive SATU care including collection of forensic evidence which may have significant evidential value. This approach provides further opportunity for comprehensive detection of a crime, even if reporting to the police is delayed.

Glufosinate is a widely and increasingly used non-selective, broad-spectrum herbicide. Although cases of glufosinate poisoning are frequently reported, they are rarely documented in forensic case reports, particularly in fatal instances. The present study examined six cases of glufosinate poisoning, including a fatal case involving a 25-year-old female found deceased by the roadside, with an empty 1000 mL bottle labeled "glufosinate" by her side. Biological specimens such as plasma or cardiac blood, gastric contents, and liver tissues were collected for quantitative analysis of glufosinate levels using LC-MS/MS. In five cases of acute glufosinate poisoning, glufosinate plasma concentrations ranged from 0.62 to 3.92 μg/mL. In the fatal case, the concentrations of glufosinate in cardiac blood, gastric contents, and liver tissues were 8.41 μg/mL, 31.25 μg/mL, and 66.1 μg/g, respectively. The pathological autopsy concluded that the cause of death was acute cardio-respiratory failure due to glufosinate poisoning, characterized by multi-organ congestion without specific pathological findings. The toxicological data provided in this study aim to serve as a critical reference for future clinical treatment and forensic validation of glufosinate poisoning-related deaths.

Introduction

Sudden non-cardiac death (SNCD) is a clinical entity comprising deaths lacking previous clinically significant symptoms, and in which the mechanisms of death do not involve the heart. Infection is a major cause of SNCD, particularly in children, and viruses are frequently involved in the disease process. Nevertheless, SNCD of viral infectious causes remains poorly characterized. Thus, a systematic review of the literature describing the association between viral infection and the development of SNCD was performed.

Methods

PRISMA statement guidelines were followed in this systematic review. A literature search was conducted across MEDLINE, Scopus and Web of Science databases. Studies considered eligible were autopsy series or cohort studies of sudden death cases, in which evidence of viral disease as a cause of death was demonstrated, along with identification of causative agents.

Results

Twelve studies published between 1996 and 2020 were included in this review. Selected studies were categorized into three groups according to the study population: infants and young children (up to four years of age); presumed sudden infant death syndrome patients; and older individuals (five years of age and older). SNCD with viral implication represents a minority of sudden death cases in all age groups, with infants and young children having a higher prevalence across studies. Respiratory infection was the main cause of viral SNCD, with influenza virus and respiratory syncytial virus being the most commonly identified agents in older individuals, and infants and young children respectively. Disseminated infection, gastrointestinal infection, and meningitis were other identified causes of SNCD in children.

Conclusions

No studies have directly assessed the frequency and causes of viral SNCD. Infants and young children show a considerable, but variable, prevalence of this clinical entity. Wider implementation of post-mortem virological molecular testing may help uncover previously unknown cases. More research into viral SNCD is needed, especially in the adult population.

Alcohol use upsurges the risk for many chronic ill-health consequences such as hepatitis, malignancies, and disastrous outcomes like road traffic accidents ending in fatal injuries. Biochemical and toxicological analysis of different body fluids is crucial for identifying the cause of death and postmortem interval in many forensic cases. Blood, urine, and vitreous fluid are the most valuable body fluids for detecting alcohol during any toxicological analysis. Alcohol is responsible for widespread morbidity and mortality worldwide. Blood alcohol concentration (BAC) is a necessary toxicological test to investigate various crime and accident scenes. This study comprehensively explores the demographic characteristics, BAC distribution, and correlations of alcohol concentrations in postmortem and living cases. Postmortem cases (N = 166) reveal intriguing demographic patterns, with notable variations in year distribution, nationality, sex, age groups, occupation, smoking habits, place of death, and psychiatric history. Living cases (N = 483) exhibit distinct demographic profiles, emphasizing differences in year distribution, nationality, sex, age groups, and smoking habits.

Analysis of BAC distribution reveals diverse patterns in both postmortem and living cases, providing valuable insights into the prevalence of different BAC levels in each group. Correlation analyses unveil strong associations between alcohol concentrations in various biological samples in postmortem cases, highlighting the interdependence of blood, vitreous, and urine alcohol concentrations. Conversely, living cases display a moderate positive correlation between blood and urine alcohol concentrations.

Comparative analyses showcase significant differences in mean alcohol concentrations between postmortem and living cases, suggesting variations in alcohol metabolism and distribution. These findings underscore the importance of considering temporal factors in interpreting alcohol concentrations in forensic and clinical contexts.

In conclusion, this study enhances our understanding of alcohol-related incidents by delineating demographic profiles, BAC distributions, and correlations between different biological samples. Such insights are crucial for refining investigative and clinical approaches, contributing to the broader fields of forensic science and public health.

Background

Dental malpractice claims, which pertain to legal actions against dentists accused of clinical negligence that caused harm to patients, have increased in the past ten years in South Korea. The claims are caused by complications, particularly trigeminal nerve injuries, resulting from various dental procedures. Medicolegal issues related to trigeminal nerve injury have not been previously described in South Korea. Therefore, in this study, we aimed to identify the general, dental, and judicial characteristics of closed dental malpractice claims.

Methods

This study was designed as a descriptive study. We collected the data of 51 closed claims related to trigeminal nerve injury resulting from dental procedures such as dental implant emplacement, tooth extraction, and local anesthesia. The claims were decided by courts in South Korea between 2016 and 2023. The general, dental, and judicial characteristics of the claims were analyzed retrospectively.

Results

The average claim resolution period was 4.2 (range: 1.47–8.39) years post-adverse events that occurred more frequently in dental clinics (68.6 %) than in dental (25.5 %) or general hospitals (5.9 %). Inferior alveolar (66.7 %) and lingual (17.6 %) nerves were injured following dental procedures. The duty to inform was breached in 68.6 % of claims. The dental procedure performed (P < 0.001) and the injured nerve (P < 0.001) were associated with the violation of the duty to care.

Conclusion

To improve the quality of dental care services, the analysis of the adverse events using various resources including judgments should be strongly addressed.

Introduction

The scientific community highlighted the relevance of 3D physical models since the beginning of the XXI century, complementary to three-dimensional(3D) digital volume by computer tomography, to support court discussions on medico-legal issues. The recreation of 3D evidence can be an important tool for investigators and experts, providing a better understanding of the causes and circumstances of the events involved in a crime.

Objective

The present study aims to assess the reproducibility of 3D printed and 3D tomographic volumes generated from mandibles following simulated forensic injuries, highlighting the recreation of crime tools.

Material and methods

Concerning the study design presented, data collection was performed in three phases. Nine simulated injuries of forensic interest were selected (phase1) and all the mandibles were scanned tomographically, individually, by Cone Beam Computed Tomography CBCT (phase 2). Then, in phase 3, the DICOM images were used for 3D printing with the Ender 3® printer by the Fused Deposition Modeling (FDM) technique. The data analysis followed two procedures: the comparison between the artificial mandible and 3D tomographic volume (AT) and the comparison between the artificial mandible and 3D printed volume, or the copy (AC). Data were analyzed using T-Student and ICC tests and presented in Bland-Altman plots.

Conclusion

The analogic technique applied in 3D printed volume, when compared with computerized technique, using 3D digital images and measurement, showed to be accurate and reproducible. Further studies are needed in search of standardization for three-dimensional measurements in digitized and printed volumes.

Physical restraint is usually used when trying to control and terminate a violent episode. Many causes are possible behind aggressive, agitated, and violent behavior. Some of these are such factors that can either be detected in forensic autopsies or can be evident from the person's medical records. Various causes for deaths during physical restraint have been suggested.

In this study, we wanted to review all incidents in which physical restraint was employed, ending in death of the restrained person, whether the restraint was applied by police officers, security guards, police custody personnel, health care personnel or ordinary civilians. The main aim was to see if this new kind of study design would increase our knowledge in circumstances and causes leading to death in restraint situations.

Data was collected retrospectively from all forensic autopsies performed in the Southern Finland area during 2010–2015. We went through 21,036 forensic autopsy cases and found 12 cases (0.06 %) in which a physical restraint was employed before death. Police officers were involved in the physical restraint in 7/12 of the cases: in two of these cases, police alone; in three cases, police and guards; and in two cases, police and health care personnel. Civilians carried out the restraint in 5/12 cases. With civilians responsible for the restraint, the cause of death was more likely considered to be a result of the restraint itself than in cases where police and other authorities were responsible for the restraint. This could be because civilians aren't educated about safe restraint methods, and they might themselves be intoxicated. Alcohol was the most common psychoactive substance found in this study and could be a risk factor for not only aggressive behavior but also death, since alcohol use can provoke cardiac arrhythmias and even sudden death. Based on this study, and previously published studies, we see restraint deaths as a varying spectrum of deaths, in which the death is often possibly a result of many factors, including the effects of agitation and restraint, intoxication, and cardiac and other illnesses.