Patterns of Trauma Induced by Motorboat and Ferry Propellers as Illustrated by Three Known Cases from Rhode Island*

Abstract: Understanding patterns of trauma is important to determining cause and manner of death. A thorough evaluation of taphonomy, trauma, and bone fracture mechanisms is necessary to reconstruct the circumstances of the death. This study examines the skeletal trauma caused by boat propeller strikes in terms of wound characteristics and location based on three cases from Rhode Island. These case studies review the traumatic characteristics caused by propeller injuries and highlight the anatomic regions most likely to sustain skeletal trauma. With this information, investigators may be able to identify propeller trauma even in severely decomposed remains. The discussion of boat propeller trauma also raises issues regarding how forensic anthropologists and forensic pathologists classify trauma (specifically blunt force vs. sharp) and highlights semantic issues arising in trauma classification. The study also discusses why these propeller cases should be classified as blunt trauma rather than sharp or chop/hack trauma. Ultimately, the authors urge consistency and communication between pathologist and forensic anthropologists performing trauma analyses.     

A Bayesian approach to the group versus individual prediction controversy in actuarial risk assessment

Recent attempts to indict the use of actuarial risk assessment instruments have relied on confidence intervals to demonstrate that risk estimates derived at the group level do not necessarily apply to any specific individual within that group. This article contends that frequentist confidence intervals are inapposite to the current debate. Instead, Bayesian credible intervals are necessary-in principle-to accomplish what commentators are concerned about: describing the precision of an actuarial risk estimate. After illustrating both the calculation and interpretation of credible intervals, this article shows how such intervals can be used to characterize the precision of actuarial risk estimates. It then explores the legal implications of wide and overlapping intervals. Contrary to what detractors claim, the fact that risk estimate intervals overlap is not a germane to legal (logical) relevance, and therefore actuarial risk estimates cannot be per se "inadmissible" on this basis.     

Comparison of quantitative PCR and culture-based methods for evaluating dispersal of Bacillus thuringiensis endospores at a bioterrorism hoax crime scene

Since the anthrax mail attacks of 2001, law enforcement agencies have processed thousands of suspicious mail incidents globally, many of which are hoax bioterrorism threats. Bio-insecticide preparations containing Bacillus thuringiensis (Bt) spores have been involved in several such threats in Australia, leading to the requirement for rapid and sensitive detection techniques for this organism, a close relative of Bacillus anthracis. Here we describe the development of a quantitative PCR (qPCR) method for the detection of Bt crystal toxin gene cry1, and evaluation of the method's effectiveness during a hoax bioterrorism event in 2009. When combined with moist wipe sampling, the cry1 qPCR was a rapid, reliable, and sensitive diagnostic tool for detecting and quantifying Bt contamination, and mapping endospore dispersal within a mail sorting facility. Results from the cry1 qPCR were validated by viable counts of the same samples on Bacillus-selective agar (PEMBA), which revealed a similar pattern of contamination. Extensive and persistent contamination of the facility was detected, both within the affected mailroom, and extending into office areas up to 30m distant from the source event, emphasising the need for improved containment procedures for suspicious mail items, both during and post-event. The cry1 qPCR enables detection of both viable and non-viable Bt spores and cells, which is important for historical crime scenes or scenes subjected to decontamination. This work provides a new rapid method to add to the forensics toolbox for crime scenes suspected to be contaminated with biological agents.     

From sultanism to neopatrimonialism? Regionalism within Turkmenistan

This paper proposes that under President Berdimuhamedov, the government of Turkmenistan has begun to move away from the ‘sultanism’ of the Niyazov era. Instead, the new government exhibits characteristics and has pursued policy changes that prepare conditions for the further development and entrenchment of localized networks of elites based on kinship. Such changes suggest that the government of Turkmenistan may develop into a more classic neopatrimonial system of authoritarian governance similar to the other post-Soviet republics in Central Asia. This argument is advanced by examining changes between the governments of former President Niyazov and Berdimuhamedov with regard to three areas of the Turkmen state's relationship with its constituent regions: regional composition of the national cabinet; hakim (governor) policy; and regional development. This examination relies largely on a comprehensive survey of online Turkmen state-media sources, as well as numerous supportive secondary sources.     

Accuracy and reliability of cone beam computed tomography of the jaws for comparative forensic identification: a preliminary study

Conventional computed tomography is an emerging modality in forensic identification but is not sufficiently accurate for use in dental identification primarily because of problems with metallic dental restoration-induced streak artifact. In this study, the accuracy and reliability of recording forensic information from cone beam computed tomography (CBCT) scans of the jaws when compared to conventional panoramic radiographs has been analyzed under experimental conditions. Information could be recorded with near-perfect repeatability and reproducibility. Information could also be recorded accurately, the sensitivity being 96.6% (95% CI, 95.1-98.1) and specificity being 98.4% (95% CI, 96.2-100). The metal dental restoration-induced streak artifact was at a level that permitted, in most cases, accurate observations. This is considered an important step in validating CBCT as a tool in comparative dental identification of bodies. It may have a role in mass fatalities and in chemical, biological, radiological, and nuclear incidents, but further studies are required to assess the feasibility of this.     

Examining macro-level impacts on procedural justice and police legitimacy

Purpose

Many studies have lent empirical support to the procedural justice model of police legitimacy; however, there has, as yet, not been widespread consideration of the potential impact of neighborhood- and community-level factors on people's perceptions of procedural justice or police legitimacy. The present study integrates the macro-level policing literature with the psychological-based procedural justice framework to uncover what effects, if any, the sociostructural environment has on procedural justice and police legitimacy.

Methods

Hierarchical linear modeling integrates census and survey data within a single, mid-sized city.

Results

Concentrated disadvantage exerted a marginally-significant impact on procedural justice, and on police legitimacy while controlling for procedural justice. Procedural justice remained the strongest predictor of legitimacy, even when accounting for macro-level characteristics.

Conclusions

The effect of procedural justice on police legitimacy appears to be robust against the deleterious impacts of concentrated disadvantage. This has implications for procedural justice research, theory, and policing.     

Does a sixth mechanism exist to explain lightning injuries?: investigating a possible new injury mechanism to determine the cause of injuries related to close lightning flashes

Five mechanisms have been described in the literature regarding lightning injury mechanisms. A sixth mechanism is proposed in this article, namely, lightning barotrauma. A simple laboratory experiment was conducted using ordnance gelatin for ballistic studies. Lightning was simulated in a high-voltage laboratory using an 8/20-microsecond current impulse generator and discharged through ballistic gel. Temporary and permanent cavity formations were confirmed. The cavities formed were directly proportional to the currents used. Findings suggest that a sixth mechanism of lightning injury, namely, barotrauma, should be considered.     

Assisted reproduction and mental illness: a human rights perspective from New Zealand

Developments in our ability to artificially assist reproduction have led to new and more social applications for medicine. Parallel to this has been an increasing acceptance and understanding of mental illness. Yet it may be argued that mental illness should preclude an ability to parent by means of state-involved artificial reproductive technologies. Through examination of current New Zealand human rights law, it is argued that such practice would be discriminatory. While there is some room to grant an exception to allow such discrimination, it is doubtful that such a decision would ever be made. Any reasons to justify an exception are unlikely to meet the high threshold demanded by current law.