The identification of two unusual types of homemade ammunition

Illegal homemade ammunition is commonly used by criminals to commit crimes in Taiwan. Two unusual types of homemade ammunition that most closely resembling genuine ammunition are studied here. Their genuine counterparts are studied as the control samples for the purpose of comparison. Unfired ammunition is disassembled, and the morphological, dimensional, and compositional features of the bullet and cartridge case are examined. Statistical tests are employed to distinguish the dimensional differences between homemade and genuine ammunitions. Manufacturing marks on head stamps of the cartridge case are carefully examined. Compositional features of propellant powders, primer mixtures, and gunshot residues are also analyzed. The results reveal that the morphological, dimensional, and compositional features of major parts of the ammunition can be employed to differentiate homemade cartridges from genuine ones. Among these features, tool marks on the head stamps left by the bunter can be used to trace the origin of ammunition.     

Radiographic comparison of a fractured clavicle exhibiting a pseudo-arthrosis

Bone remodeling is a natural process that is potentially problematic for radiographic comparisons because it can occur after antemortem (AM) imaging, thus interfering with the comparability of AM and postmortem (PM) radiographs from the same individual. While the effects of age-related remodeling have been studied, limited attention has been given to trauma-related remodeling with respect to radiographic comparisons. This report adds to the latter topic by presenting a case of AM clavicle fracture that developed into a pseudo-arthrosis over a 12-month period prior to the individual's death. Even though remodeling was discernable along the fracture margins, adjacent skeletal features on the PM radiograph remained unaltered and constituted compelling evidence for the identification. This case illustrates the potential of using both normal and pathological anatomy concurrently to maximize the surety of findings from radiographic comparisons.     

Postmortem vitreous Beta-hydroxybutyrate: interpretation in a forensic setting*

Abstract: Vitreous beta‐hydroxybutyrate (BHB) was retrospectively analyzed in 1795 forensic cases using the Pointe Scientific method. Comparison of vitreous BHB with vitreous glucose in 1781 of the cases showed moderately good correlation r = 0.731. Comparison with blood alcohol levels in 1561 of the cases showed no correlation r = ?0.053. Vitreous BHB was a marker of diabetic ketoacidosis when above 6.0 mM with a vitreous glucose over 200 mg/dL. It was an indicator (>50%) for alcoholic ketoacidosis when above 6.0 mM with a vitreous glucose below 200 mg/dL. Recommendations for interpretation of vitreous BHB: <0.4 mM normal; 0.41–1.2 mM slightly elevated, rarely (<1%) of concern; 1.21–2.0 mM moderately elevated, less rarely (2.5%) of concern; 2.01–6.0 mM significantly elevated, frequently of concern (12–48%); >6.0 mM usually (100% in this study) indicated life‐threatening conditions. Vitreous BHB was helpful evaluating cases with ketogenic conditions, especially diabetes and alcoholism.     

Development of a real-time method to detect DNA degradation in forensic samples

Abstract: Knowledge of the degradation state of evidentiary DNA samples would allow selection of the appropriate analysis method (standard short tandem repeats [STRs] vs. mini STRs vs. mtDNA). This article describes the development of a Plexor® technology/real‐time PCR DNA degradation detection assay, which uses a common forward primer and two reverse primers (different fluorophores) to generate two Alu amplicons (63 and 246 bp). This very sensitive assay was optimized for reaction volume, cycle number, anneal/extend time, and temperature. Using DNA samples degraded with DNaseI, the ratio of the concentration of the short amplicon to the concentration of the long amplicon (degradation ratio) was increased versus time of degradation. Experiments were performed on a variety of environmentally degraded samples (age, sunlight, heat) and with seven commonly encountered forensic inhibitors. The degradation ratio was found to predict the observed loss of larger STR loci seen in the analysis of comprised samples.     

Bayesian networks and the value of the evidence for the forensic two-trace transfer problem*

Forensic scientists face increasingly complex inference problems for evaluating likelihood ratios (LRs) for an appropriate pair of propositions. Up to now, scientists and statisticians have derived LR formulae using an algebraic approach. However, this approach reaches its limits when addressing cases with an increasing number of variables and dependence relationships between these variables. In this study, we suggest using a graphical approach, based on the construction of Bayesian networks (BNs). We first construct a BN that captures the problem, and then deduce the expression for calculating the LR from this model to compare it with existing LR formulae. We illustrate this idea by applying it to the evaluation of an activity level LR in the context of the two-trace transfer problem. Our approach allows us to relax assumptions made in previous LR developments, produce a new LR formula for the two-trace transfer problem and generalize this scenario to n traces.     

Implementation: Making Hard Work of Something Simple

Early in 2012 the Rural Property Addressing Project in South Australia announced that it had substantially met its outcomes, and that the whole of the project was soon to be completed. In 2003, one of the recommendations to cabinet from the South Australian Premier's Bushfire Summit was to endorse the development of a standard property addressing system for rural properties across the state. This was formally endorsed by cabinet, and was a direct response to the fact that essential services such as ambulance, medical and social care were hindered in providing services to the residents of Eyre Peninsula during and after the bushfires. Overall, this was not a controversial decision, nor was it a huge implementation challenge, yet it took nine years to come into effect. This is a classic case of the tyranny of small decisions. This article outlines some of the implementation challenges faced by this apparently simple project, and provides some thoughts for implementation challenges of the future. The take‐away message is that if something so comparatively simple was made so complex, how can we adapt our public services to the cross‐cutting challenges of the future?     

A psycho‐political profile of party activists and left‐wing and right‐wing extremists

Previous studies comparing ideological groups have been restricted to tests of between‐group differences in the means of relevant political psychological variables, thereby neglecting group differences in the variances, meanings and nomological networks of the tested variables. A first exploratory study used data from the European Social Survey (N = 7,314) comparing groups of political party members on the basis of their scores on a self‐placement left–right scale. The second study (N = 69) constituted an in‐depth test for the presence of differences between samples of political activists of moderate parties, communists, anarchists and right‐wing extremists. The results revealed that there is a fair amount of heterogeneity within left‐wing and right‐wing extremists, indicating a substantial amount of within‐group variance of social attitudes, values and prejudice. Moreover, the extremist ideologies are best approached as distinct ideologies that cannot be reduced to extreme versions of moderate ideology, and differences in the meanings and nomological networks of the various extremist ideologies were also obtained. It is erroneous to consider members of extremist groups as being ‘all alike’. The findings obtained from samples of political moderates are not a particularly solid basis for theories about extremism.     

Do voters reward rebellion? The electoral accountability of MPs in Britain

To hold their Members of Parliament individually accountable for their legislative behaviour, British voters would need to base their decision to vote for an MP at least partially on the extent to which the MP's legislative voting behaviour deviated from that of the MP's party leadership. Voters should evaluate this deviation contingent on their views of the party leadership. MP rebellion can signal that voter–MP congruence is greater than that of the voter and the MP's party leadership. In this article it is found that only constituents with negative attitudes toward the Labour government reward rebellious Labour MPs, albeit to a limited extent. A similar conditional association is not observed on a single issue: Iraq. The policy accountability of MPs is relatively weak and general rather than issue‐specific.     

Motivating the European voter: Parties,issues and campaigns in European Parliament elections

Voters behave differently in European Parliament (EP) elections compared to national elections because less is at stake in these ‘second‐order’ elections. While this explains the primary characteristic of EP elections, it has often led to a conflation of distinct motivations for changing behaviour – namely sincere and protest voting. By distinguishing these motivations, this article addresses the question of when and why voters alter their behaviour in EP elections. In addition, it argues that the degree of politicisation of the EU in the domestic debate shapes the extent to which voters rely on EU, rather than national, considerations. These propositions are tested in a multilevel analysis in 27 countries in the 2009 EP elections. The findings have important implications for understanding why voters change their behaviour between different types of elections.     

Mandated justice: The potential promise and possible pitfalls of mandating procedural justice in the workplace

This study addresses the question of whether and how legal authorities ought to intervene in work organizations in order to most effectively regulate the behavior of employees. This question is examined empirically, by exploring whether the association between the level of fairness employees experience in procedures regarding pay and benefits, and their adherence to workplace rules, differs depending upon whether those procedures are enacted by companies voluntarily or mandated by law. This question was addressed using both a survey of a representative sample of employees in Israel, as well as their reactions to an experimental vignette. The results generally suggest that evaluations of the procedural justice of performance appraisal hearings more strongly influenced judgments of overall workplace fairness, perceptions of management legitimacy, and employee rule‐adherence behavior when employees believed fairer workplace procedures were required by law.