Myocardial Bridging: A Meta‐Analysis of Prevalence

The main objective of this article was to analyze prevalence data about myocardial bridging (MB) in published studies. To this purpose, we performed a meta‐analysis of studies published in English literature that contained data about the prevalence of MB and its anatomical characteristics. The overall prevalence was 19% (CI: 17–21%); autopsy studies revealed an overall prevalence of 42% (CI: 30–55%), CT studies 22% (CI: 18–25%), and coronary angiography 6% (CI: 5–8%). Most bridges were located on the left anterior descending artery (82% overall, 63% on autopsy studies), had a mean thickness of 2.47 mm and a mean length of 19.3 mm. In conclusion, autopsy studies should be the gold standard in evaluating the actual prevalence of myocardial bridges, while in vivo high‐resolution CT scanning should be preferred to coronary angiography studies.     

Classification Improvements in Automated Gunshot Residue (GSR) Scans

Classification of particles as gunshot residues (GSRs) is conducted using a semiautomatic approach in which the system first classifies particles based on an automatic elemental analysis, and then, examiners manually analyze particles having compositions which are characteristic of or consistent with GSRs. Analyzing all the particles in the second stage is time consuming with many particles classified by the initial automated system as being potentially GSRs excluded as such by the forensic examiner. In this paper, a new algorithm is developed to improve the initial classification step. The algorithm is based on a binary tree that was trained on almost 16,000 particles from 43 stubs used to sample hands of suspects. The classification algorithm was tested on 5,900 particles from 23 independent stubs and performed very well in terms of false positive and false negative rates. A routine use of the new algorithm can reduce significantly the analysis time of GSRs.     

Controversial Suicide Case Using a Submachine Gun with a Sound Suppressor—The Need of Team Work of Forensic Chemistry and Firearm Examiners

Evidence materials in a presumed suicide case were studied by a firearm examiner and a forensic chemist. The victim's body with double gunshot wounding in his forehead, a machine gun in the sustained fire mode with a silencer, and four cartridge cases were found. Examinations of the evidence, the case file studies, and experiments dedicated to the case were carried out. Relationships between the placement of cartridge cases and the gun were established using a fast camera. The distributions of gunshot residues on the evidence materials and within the comparative gunshot patterns were studied by means of optical and electron microscopy, X‐ray microanalysis, and infrared spectroscopy. The shooting distance was assessed to be 30 cm or more, whereas the greatest distance that could have been achieved by the victim himself was about 11–13 cm. The obtained results supported the version of homicide rather than suicide.     

影响性刑事冤假错案的产生、纠错、追责与民意的关联考察——以22起影响性刑事冤假错案为主要研究范本

民意的影响是冤假错案产生的诱因之一。不理性的民意极易虚构出貌似合理的"案件事实"并以此给司法机关施压。基于民意的压力,司法机关往往更多注重有罪证据,忽视无罪证据。命案必破、限期破案、疑罪从轻等刑事政策、司法理念,都是对民意诉求的顺应,也是促成冤假错案的诱因。民意对影响性冤假错案的纠错有积极意义,但仍应回归法治轨道。样本案件中,民意推进了冤假错案纠错程序的启动、纠错的及时,但没有制度化。民众对司法活动的认知不够理性,对错案追责的民意表达亦非建立在理性认知的基础之上。我国有必要培育理性的民意,形成民意与刑事司法的良性互动。     

‘The Sky is Falling!’ – Responses to the ‘Going Dark’ problem

The shared concern expressed in the two quotes below is that modern technologies provide criminals with a capability to evade investigation. This comment piece examines some of the policy and legal options available to governments and law enforcement agencies to try to address this concern. While accepting the claim that this phenomenon represents a real challenge to law enforcement agencies, we currently have insufficient evidence to show the true extent of the problem. What this piece does not accept is the implication contained in the quotes, and often made explicit by others, that the use of encryption represents a fundamental and irreversible shift in the balance of power between criminals and their investigators from what previously prevailed. Such claims tend to lack historical perspective, which is one of the themes of this 200th issue of Computer Law and Security Review.     

Law enforcement access to personal data originally collected by private parties: Missing data subjects' safeguards in directive 2016/680?

Access by law enforcement authorities to personal data initially collected by private parties for commercial or operational purposes is very common, as shown by the transparency reports of new technology companies on law enforcement requests. From a data protection perspective, the scenario of law enforcement access is not necessarily well taken into account. The adoption of the new data protection framework offers the opportunity to assess whether the new ‘police’ Directive, which regulates the processing of personal data for law enforcement purposes, offers sufficient safeguards to individuals. To make this assessment, provisions contained in Directive 2016/680 are tested against the standards established by the ECJ in Digital Rights Ireland and Tele2 Sverige on the retention of data and their further access and use by police authorities. The analysis reveals that Directive 2016/680 does not contain the safeguards identified in the case law. The paper further assesses the role and efficiency of the principle of purpose limitation as a safeguard against repurposing in a law enforcement context. Last, solutions to overcome the shortcomings of Directive 2016/680 are examined in conclusion.     

Doubling Down: Inequality in Responsiveness and the Policy Preferences of Elected Officials

Is bias in responsiveness to constituents conditional on the policy preferences of elected officials? The scholarly conventional wisdom is that constituency groups who do not receive policy representation still obtain some level of responsiveness by legislators outside of the policy realm. In contrast, we present a theory of preference‐induced responsiveness bias where constituency responsiveness by legislators is associated with legislator policy preferences. Elected officials who favor laws that could disproportionately impact minority groups are also less likely to engage in nonpolicy responsiveness to minority groups. We conducted a field experiment in 28 US legislative chambers. Legislators were randomly assigned to receive messages from Latino and white constituents. If legislators supported voter identification laws, Latino constituents were less likely to receive constituency communications from their legislators. There are significant implications regarding fairness in the democratic process when elected officials fail to represent disadvantaged constituency groups in both policy and nonpolicy realms.     

Focused Deterrence Strategies and Crime Control

Research Summary

Focused deterrence strategies are increasingly being applied to prevent and control gang and group‐involved violence, overt drug markets, and individual repeat offenders. Our updated examination of the effects of focused deterrence strategies on crime followed the systematic review protocols and conventions of the Campbell Collaboration. Twenty‐four quasi‐experimental evaluations were identified in this systematic review. The results of our meta‐analysis demonstrate that focused deterrence strategies are associated with an overall statistically significant, moderate crime reduction effect. Nevertheless, program effect sizes varied by program type and were smaller for evaluations with more rigorous research designs.

Policy Implications

The available empirical evidence suggests these strategies generate noteworthy crime reduction impacts and should be part of a broader portfolio of crime reduction strategies available to policy makers and practitioners. Investments still need to be made, however, to strengthen the overall rigor of program evaluations and improve our understanding of key program activities associated with observed crime reduction impacts.