Experimental study of the expansion dynamic of 9 mm Parabellum hollow point projectiles in ballistic gelatin

We study in this paper the expanding behaviour of hollow point 9 mm Parabellum projectiles (Hornady XTP(?) and Speer Gold Dot(?)). We defined a deformation rate that takes into account both the diameter increase and the length reduction. We plotted the behaviour of this parameter versus impact velocity (we refer to this curve as the expanding law). This expanding law has been plotted for different gelatin weight ratios and different gelatin block lengths. We completed our experiments with a set of high speed movies in order to correlate the deceleration to the state of expansion and size of the temporary cavity. Our results pointed out that full expansion is reached shortly after the projectile fully penetrates the gelatin. This result shows that the key point to accurately simulate human body interaction with a hollow point projectile is to accurately simulate the interface (skin, skull, clothes thoracic walls). Simulating accurately organs is only an issue if a quantitative comparison between penetration depths is required, but not if we only focus on the state of expansion of the projectile. By varying the gelatin parameters, we discovered that the expanding law exhibits a velocity threshold below which no expansion occurs, followed by a rather linear curve. The parameters of that expanding law (velocity threshold and line slope) vary with the gelatin parameters, but our quantitative results demonstrate that these parameters are not extremely critical. Finally, our experiments demonstrate that the knowledge of the expansion law can be a useful tool to investigate a gunshot in a human body with a semi-jacketed projectile, giving an estimation of the impact velocity and thus the shooting distance.     

The use of the likelihood ratio for evaluative and investigative purposes in comparative forensic handwriting examination

This paper extends previous research and discussion on the use of multivariate continuous data, which are about to become more prevalent in forensic science. As an illustrative example, attention is drawn here on the area of comparative handwriting examinations. Multivariate continuous data can be obtained in this field by analysing the contour shape of loop characters through Fourier analysis. This methodology, based on existing research in this area, allows one describe in detail the morphology of character contours throughout a set of variables. This paper uses data collected from female and male writers to conduct a comparative analysis of likelihood ratio based evidence assessment procedures in both, evaluative and investigative proceedings. While the use of likelihood ratios in the former situation is now rather well established (typically, in order to discriminate between propositions of authorship of a given individual versus another, unknown individual), focus on the investigative setting still remains rather beyond considerations in practice. This paper seeks to highlight that investigative settings, too, can represent an area of application for which the likelihood ratio can offer a logical support. As an example, the inference of gender of the writer of an incriminated handwritten text is forwarded, analysed and discussed in this paper. The more general viewpoint according to which likelihood ratio analyses can be helpful for investigative proceedings is supported here through various simulations. These offer a characterisation of the robustness of the proposed likelihood ratio methodology.     

Traumatic bilateral vertebral artery dissection

Traumatic vertebral artery dissection is not often seen by forensic pathologists, and cases investigated are scarce in the forensic literature. We present the case of a 40-year-old woman cyclist who was struck by a car while wearing a helmet, and was neurologically near normal immediately thereafter at Emergency. She presented 48 h later with acute right hemiparesis, decreasing level of consciousness, and unsteadiness. CT revealed massive cerebellar infarction. CT angiography was normal. The patient died in coma 7 days after injury and autopsy revealed bilateral edematous cerebellar infarction and bilateral vertebral artery dissection. Rotational neck injury and mural tear in the wall of the Atlantic parts of both vertebral arteries is suggested as the possible mechanism of the arterial injury. Head and neck injuries are reported as a precipitating cause of vertebral artery injury. The possible influence of trauma may be further underestimated if longer intervals between vessel dissection and ischemia occur. The current case illustrates that "talk-and-die" syndrome may be due to occult vertebral artery dissection, possibly bilateral. In forensic cases of delayed death after mild trauma to the head and neck, the vertebral arteries should be examined for the cause of death.     

Reporting a sudden death due to accidental gasoline inhalation

The investigation of uncertain fatalities requires accurate determination of the cause of death, with assessment of all factors that may have contributed to it. Gasoline is a complex and highly variable mixture of aliphatic and aromatic hydrocarbons that can lead to cardiac arrhythmias due to sensitization of the myocardium to catecholamines or acts as a simple asphyxiant if the vapors displace sufficient oxygen from the breathing atmosphere. This work describes a sudden occupational fatality involving gasoline. The importance of this petroleum distillate detection and its quantitative toxicological significance is discussed using a validated analytical method. A 51 year-old Caucasian healthy man without significant medical history was supervising the repairs of the telephone lines in a manhole near to a gas station. He died suddenly after inhaling gasoline vapors from an accidental leak. Extensive blistering and peeling of skin were observed on the skin of the face, neck, anterior chest, upper and lower extremities, and back. The internal examination showed a strong odor of gasoline, specially detected in the respiratory tract. The toxicological screening and quantitation of gasoline was performed by means of gas chromatography with flame ionization detector and confirmation was performed using gas chromatography-mass spectrometry. Disposition of gasoline in different tissues was as follows: heart blood, 35.7 mg/L; urine, not detected; vitreous humor, 1.9 mg/L; liver, 194.7 mg/kg; lung, 147.6 mg/kg; and gastric content, 116,6 mg/L (2.7 mg total). Based upon the toxicological data along with the autopsy findings, the cause of death was determined to be gasoline poisoning and the manner of death was accidental. We would like to alert on the importance of testing for gasoline, and in general for volatile hydrocarbons, in work-related sudden deaths involving inhalation of hydrocarbon vapors and/or exhaust fumes.     

Does Separation or Divorce Make any Difference? An Interactional Perspective on Intimate Partner Violence with Focus on Marital Status

This article reports a study of the impact of marital status on interactional aspects of intimate partner violence (IPV) among help-seeking women. Are there differences among marital status groups concerning (a) other sociodemographic variables, (b) IPV categories, (c) interactional IPV variables, and (d) perception and interpretation of IPV? A representative sample of 157 women recruited from family counseling, the police, and shelters were interviewed. There was no significant sociodemographic difference among the marital status groups. There were no significant differences pertaining to IPV categories, neither for IPV severity, injury, duration, frequency, mortal danger, and regularity, nor for physical, psychological, or sexual IPV. However, multivariate logistic regression showed that post-separation women were significantly more likely to have (a) had longer duration since the last psychological and sexual IPV episode, (2) reported the physical IPV to be more predictable, and (3) used more active coping strategies against physical IPV. However, our research was not able to determine if perception and interpretation predict actual leaving behavior, or vice versa, or how the victim’s subjective perception and interpretation of the IPV changes over time.     

Correlates of Substantiated Emotional Maltreatment in the Second Canadian Incidence Study

The objective of this study was to determine the correlates of substantiated psychological maltreatment (PMT) in Canada on functions of maltreatment characteristics, child profile, household profile, and child protection services interventions. This study is based on a secondary analysis of data collected in the second Canadian Incidence Study. PMT investigations were categorized into six groups: emotional abuse, emotional neglect, and other maltreatment as single form, and these same three groups when they co-occurred with another form of maltreatment. Six logistic regressions, comparing all pairs of groups, were carried out. Cases of PMT (single form) were more chronic and associated with greater adverse emotional impact than other forms of maltreatment. Mothers of psychologically maltreated children had more mental health issues. Emotional neglect cases were more complex (e.g., substance abuse, mental health, and social housing). The three co-occurrent groups present more negative factors but more risk factors are observed when PMT are also observed (e.g., emotional harm, alcohol abuse, housing problems, chronicity, and referral to other services).     

Intimate partner violence against older women in Germany: prevalence and associated factors

Violence against women is a recognized human rights and public health issue, with significant impacts on women's life and health. Until now, several studies, most of them relying on small scale samples, have explored the prevalence and health effects of intimate partner violence against older women, whereas few have examined what actually puts older women at risk of intimate partner violence. This study is based on a secondary analysis of the first national survey on violence against women in Germany, looking at the prevalence and associated factors for physical and for sexual violence by the current partners of women aged 50 to 65 and women aged 66 to 86 years. The prevalence of violence in women's current relationships was 12% and 5%, respectively. In both age groups, women who had experienced violence during childhood and nonpartner physical or sexual violence after the age of 16 had higher odds of experiencing current partner violence. Current partner violence was associated only with women and their partner's level of education and women's vocational training among women aged 66 to 86 years. Relationships where one or both partners drank heavily in recent months were associated with higher odds of violence among women aged 50 to 65. Future studies on intimate partner violence need to recognize that women above reproductive risk are also at risk of current partner violence.     

Corporate governance and financial development: a study of the French case

This paper belongs to the growing body of the “Law and finance” literature based on time-series study. It carries out an empirical investigation of the role of corporate governance in financial development. We focus on French corporate governance reforms in order to examine whether these reforms are consistent with the reorganization of the French financial system, which took place during the period 1977–2004. This research aims at evaluating one proposition of the legal origin claims based on the idea that there is a strong and stable relationship between legal origin, investor protection and financial system. A key question the study addresses is how corporate governance rules and the French financial development have changed over time. Our study suggests that indicators related to investors’ rights (shareholders, employees, and bondholders) have been increasing over time, despite the specific legal origin of the French system. On the contrary the creditors’ rights have followed a less clear trend. Our econometric investigation is fairly new as the Law and finance literature has not until now provided corporate governance indicators suitable for French legislation. From that perspective, our work undergoes a multiple criteria analysis of corporate governance reforms. Following this approach, we suggest that the causality links between changes in the French legal environment and financial growth in France are more bidirectional than unidirectional.     

(Un)secured debt and the likelihood of court-supervised reorganization

Secured and unsecured creditors engaged in a bankruptcy process have different preference on the issue of financial distress. Secured creditors generally prefer liquidation whereas unsecured creditors tend to promote firm??s reorganization. As a consequence, secured creditors might be an obstacle to reorganization when all classes of creditors have to vote to approve the reorganization plan. To complete this analysis, we study the link between bankrupt firm??s capital structure and the likelihood of reorganization when bankruptcy Courts (instead of creditors) decide whether or not firms are reorganized. Our main result is that the reduction of secured creditors?? influence on the reorganization process might constitute a means to promote bankrupt firm??s reorganization. More generally, the paper analyses the link between the amounts/numbers of both secured and unsecured claims and the final issues of a Court-supervised reorganization process.