Screening of gunshot residues using desorption electrospray ionisation-mass spectrometry (DESI-MS)

Several studies have indicated that there are potential environmental sources of particles resembling inorganic primer found in gunshot residues (GSR); as a consequence examiners are reluctant to unambiguously assign the origin of inorganic particles. If organic gunshot residues (OGSR) were found in combination with inorganic particles, the possibility of environmental sources could be potentially eliminated, thereby significantly enhancing the strength of the evidence. Methods have been previously described whereby GSR specimens can be analysed for the presence of OGSR or inorganic GRS (IGSR). However, no methods have been reported that allow the analysis of both OGSR and IGSR on the same specimen. Described in this article is a direct method using desorption electrospray ionisation-mass spectrometry (DESI-MS) for the detection of methyl centralite (MC), ethyl centralite (EC) and diphenylamine (DPA) on adhesive tape GSR stubs typically used for scanning electron microscopy-energy-dispersive X-ray (SEM-EDX) analysis. The optimisation of numerous parameters was conducted using an experimental design. The results indicate that direct analysis of these organic components of GSR is possible although some limitations were also identified. This initial investigation has also indicated that subjecting stubs to DESI analysis does not interfere with subsequent SEM-EDX analysis of primer residues; therefore the technique described herein allows a comprehensive examination of GSR that would be highly probative in the event that both OGSR and IGSR are detected in the same specimen.     

Comparing recidivism rates of treatment responders/nonresponders in a sample of 413 child molesters who had completed community-based sex offender treatment in the United kingdom

Analysis of psychometric data from a sample of 413 child molesters who had completed a U.K. probation-based sex offender treatment program was carried out to assess (a) the effectiveness of therapy in the short term and (b) the longer term implications of treatment in relation to sexual recidivism. It was found that 12% (51 offenders) of the sample had recidivated within 2 to 4 years. Of these recidivists, 86% (44 offenders) had been reconvicted for a sexually related offense. One hundred thirty-five offenders (33%) demonstrated a treated profile (i.e., demonstrated no offense-specific problems and few, or no, socioaffective problems at the posttreatment stage). This group was compared with a sample of offenders deemed as not responding to treatment, matched by their levels of pretreatment risk/need. It was found that a significantly smaller proportion (n = 12, 9%) of treatment responders had recidivated, compared to the treatment nonresponders (n = 20, 15%), indicating a 40% reduction in recidivism in those who had responded to treatment (effect size = .18). Matching length of treatment to the offenders' level of pretreatment risk/need (i.e., higher risk/treatment-need offenders typically undertook longer treatment) reduced the rate of recidivism among this group to the level of recidivism observed among the lower risk/need offenders.     

Can “disciplined passion” overcome the cynical view? An empirical inquiry of evaluator influence on police crime prevention program outcomes

Objectives

Investigate the degree and nature of influence that researchers have in police crime prevention programs and whether a high degree of influence is associated with biased reporting of results.

Methods

Meta-analytic inquiry of experimental and quasi-experimental studies (n?=?42), drawn from four Campbell Collaboration systematic reviews of leading police crime prevention strategies: problem-oriented policing, ??hot spots?? policing, ??pulling levers?? policing, and street-level drug enforcement.

Results

Larger program effects are not associated with studies with higher involvement on the part of the evaluator (e.g., assisting in strategy design, monitoring implementation, overcoming implementation problems).

Conclusions

This study does not find support for the cynical view, which holds that researchers have a personal stake in the program or are pressured to report positive results. Importantly, the evaluator??s involvement in the implementation of the program may be a necessary condition of successfully executed police experiments in complex field settings.     

Navigating the space between politics and administration: The informal practices of Ontario school board trustees

Through interviews with 25 school board trustees in Ontario, this article contributes to the growing literature that explores the politics-administration dichotomy at the local government level in Canada. While existing literature is oriented from the perspective of the local government administrator, we examine the relations between local government politicians and administrators from the orientation of the former to determine how they navigate the dichotomy, particularly in a context where it is arguably more contested. We identify six informal practices trustees adopt in representing constituents and confronting tensions inherent in their role, namely: navigating, influencing, listening, translating, informing, and uploading.     

The dominant class and industrial development in Peru

From 1968, a reformist military regime in Peru implemented an industrialising development strategy which was fundamentally at odds with the interests of the traditional ‘oligarchy’ that had dominated the primary export phase of the country's development. In order to understand this new phase of development it is necessary to reject the idea of a monolithic ‘oligarchy’ before 1968, and to see the Peruvian dominant class as already internally differentiated. An important sector of that class was by 1968 committed to the development of industry and of the urban economy generally. Its interests were explicitly at variance with those of the exporting fractions of the Peruvian dominant class.     

On the efficiency of the common law: an application to the recovery of rewards

Richard Posner’s influence on the field of law and economics cannot be overstated. Among his many contributions, Posner offered an early conjecture that remains fascinating and controversial to this day: the idea that common law rules are more likely than legislative codes to be concerned with efficiency. In this paper, I compare the efficiency of a common law rule of contracting to the efficiency of a civil law rule. In common law jurisdictions, claimants must have knowledge of a reward in order to recover. In civil law jurisdictions, however, no such knowledge is required. I analyze the efficiency of each rule by examining the incentives created by each rule. In a finding that agrees with Posner’s hypothesis, I argue that the common law rule is more efficient. The model has a number of applications beyond contract default laws. I use the model to discuss three legal questions previously analyzed by Richard Posner: (1) incentivizing innovation; (2) the finders-keepers rule in property law; and (3) salvage rights in maritime law.     

Peer Consultation for Mediators: The Use of a Holding Environment to Support Mediator Reflection, Inquiry, and Self-Knowing

In order to help the parties in mediation address their interests, concerns, and responses to the conflict, the mediator must monitor and manage his or her own inner thoughts, emotions, and feelings throughout the process lest they negatively influence the outcomes of the mediation. Peer consultation offers one approach that can be used effectively to support the mediator's inquiry into practice dilemmas and invite self-knowing that benefits the mediator as well as the parties in the mediation. The effectiveness of a group consultation process, however, depends on the development of "a holding environment" that can provide a safe and confidential space within which such an inquiry can occur. The mediation process is improved when the mediator is able to sustain relational and emotional tension within herself and between the parties long enough for new understandings and actions to develop.