A new method for casting three-dimensional shoeprints and tire marks with dental stone

Dental stone is used as the major material for recovering three-dimensional shoeprints and tire tracks from crime scenes. The procedure for using dental stone sparsely changed over the years. There are two common methods for mixing dental stone: (i) a premeasured amount of dental stone is put in a zip-lock bag to which water is added, and (ii) the water and dental stone are mixed in a bucket. We suggest a novel rapid and efficient method of mixing dental stone and water in a bottle. These methods were compared at equal conditions. The parameters measured were the number of air bubbles, the strength of the cast, the ease of use, and the sharpness and quality of the accidental characteristics present in the cast. The proposed bottle method has the advantages of both the bucket and the zip-lock methods hence it combines strength, sharpness, high quality, and ease of use.     

Dataset of Digitized RACs and Their Rarity Score Analysis for Strengthening Shoeprint Evidence

In recent years, there is a growing demand to fortify the scientific basis of forensic methodology. During 2016, the President’s Council of Advisors on Science and Technology (PCAST) published a report that states there are no appropriate empirical studies that support the foundational validity of footwear analysis to associate shoeprints with particular shoes based on specific identifying marks, which is a basic scientific demand from the field. Furthermore, meaningful databases that can support such studies do not exist. Without such databases, statistical presentation of the comparison results cannot be fulfilled either. In this study, a database of over 13,000 randomly acquired characteristics (RACs) such as scratches, nicks, tears, and holes, as they appear on shoe sole test impressions, from nearly 400 shoe soles was collected semi-automatically. The location, orientation, and the contour of each RAC were determined for all the RACs on each test impression. The statistical algorithm Statistic Evaluation of Shoeprint Accidentals (SESA) was developed to calculate a score for finding another feature similar to a particular scanned and digitized RAC in the same shape, location, and orientation as the examined one. A correlation was found between the results of SESA and the results of real casework, strengthening our belief in the ability of SESA to assist the expert in reaching a conclusion while performing casework. The score received at the end of the process serves the expert as a guiding number, allowing more objective and accurate results and conclusions.     

Childhood Predictors and Mid-Adolescent Correlates of Developmental Trajectories of Alcohol Use among Male and Female Youth

The identification of salient risk factors for alcohol consumption among male and female adolescents is an important topic not only for etiology research but also for designing effective gender-specific alcohol prevention programs for young people. This study examined the extent to which problematic alcohol use trajectories from ages 14 to 18 among male and female youth were related to childhood predictors assessed at age 9 (i.e., impulsivity, academic self-confidence, social problems with peers), socio-demographic variables, and mid-adolescent correlates [i.e., parental use, body mass index (BMI), risky peer context, conduct problems at school, parent–child relationship, somatic complaints]. Data analysis was based on a representative German longitudinal study (1986–1995, n = 1,619, 55 % female). Using growth mixture modeling methodology, associations of childhood predictors and mid-adolescent correlates to distinctive trajectories of alcohol use were examined for males and females separately. For males, a problematic consumption trajectory was associated with poor relationships to parents in adolescence and small community size. For females, low impulsivity during childhood, high BMI, and contact with deviant peers during adolescence predicted problematic as compared to normative alcohol use trajectories. Additionally, high parental alcohol use, low parental educational background, and conduct problems at school during adolescence were common predictors of a problematic alcohol use trajectory in both genders. The results provide insights regarding differences in the gender-typical development of adolescent alcohol use as well as stress the need of gender-specific intervention components along with universal prevention strategies against problematic consumption trajectories.     

Second chamber, ‘congress of ambassadors’ or federal presidency. Parliamentary and non-parliamentary aspects in the European Council's rules of procedure

The development of the European Union (EU) regime, with the frequent changes of institutions and their competencies by treaty revisions, allows for new opportunities for parliamentary studies. This article discusses the role and competencies of the European Council (EC) in the EU regime, using the heuristic and methodological resources of procedural commentaries, parliamentary rhetoric, conceptual history and political regime analysis. This study is a textual analysis, based on the 2009 Lisbon Treaty and especially on the EC's rules of procedure. The Lisbon Treaty and the respective rules of procedure serve as key documents that fix the rules, the framework and the margin of manoeuvre for the EU's institutions. This is particularly relevant in the European Union as a ‘polity in the making’, as continuous changes in institutional competencies are the rule. These changes both leave room for and are shaped by acting politically between and within the institutions. Taking Quentin Skinner's thesis that ‘political life itself sets the problems for the political theorist’ as a point of departure, it is suggested that these ongoing challenges in power relationships between the EU institutions also lead to interesting theoretical and conceptual moves. From this perspective the authors discuss possibilities to extend the conceptual apparatus of parliamentary studies to such quasi-parliamentary institutions focusing especially on the EC.     

Changes in Discrepancies Between Desired and Present States of Developmental Tasks in Adolescence: A 4-Process Model

Individuals direct their own development by setting developmental goals and striving for goal attainment. Human development includes reductions in discrepancies between desired and actual states, as is the case in goal attainment and reduction of aspirations, as well as increases of discrepancies, for example, when individuals increase their aspirations or face setbacks. The present study analyzed how ways of changing discrepancies between desired and actual states of solving developmental tasks relate to changes in adolescents' self-esteem across a 2-year period. With regard to discrepancy-reducing processes we found that increases in goal attainment were associated with increased self-esteem whereas reductions of aspirations were not systematically associated with self-esteem change. With regard to discrepancy-producing processes, diminishing of the present state was consistently associated with declines in self-esteem, whereas increases in aspirations showed inconsistent associations with self-esteem changes. The results indicate similarities and differences between developmental regulation in adolescence and adulthood.     

General Versus Specific Predictors of Male Arrest Trajectories: A Test of the Moffitt and Patterson Theories

Developmental taxonomies of crime disagree on whether distinctive offender trajectories are related to common or unique risks. This study examined childhood risks of differing arrest trajectories across childhood through early adulthood (from ages 10–11 to 26–27 years) that were identified in prior work for 203 at-risk, predominantly Caucasian young men. Multivariate analyses revealed that when both distal (childhood risk factors) and proximal risk factors (deviant peer association as a time-varying covariate) were included in the model, relatively few childhood risk factors (assessed at age 9–10 years) discriminated the chronic offender groups from rare offenders (i.e., child antisocial behavior, child attention problems, parents’ antisocial behavior). Rather, deviant peer association was significantly related to levels of offending within each trajectory group (i.e., chronic and rare offender groups). No predictor differentially predicted membership in the two chronic groups, supporting the linear gradation argument. Theoretical and prevention implications are discussed.     

Assessing Covariates of Adolescent Delinquency Trajectories: A Latent Growth Mixture Modeling Approach

Using data from a community sample of 1218 boys and girls (mean age at the first wave was 15.5 years), this longitudinal study examined several covariates—adjustment problems, poor academic achievement, negative life events, and unsupportive family environments—of distinctive trajectories of juvenile delinquency. Latent growth mixture modeling analysis revealed 6 trajectory groups: rare offenders, moderate late peakers, high late peakers, decreasers, moderate-level chronics, and high-level chronics. Several factors discriminated between more normative groups and high-level chronic offenders, including poor academic achievement, unsupportive family environments, life events, and substance use, whereas almost no differences were found between groups with more serious offending trajectories. Overall, there was more specificity in correlates of distinctive offending trajectories than expected by general theories of crime (e.g., Gottfredson, M. R., and Hirschi, T., 1990, A General Theory of Crime. Stanford University Press, Stanford, CA).     

Chemical development of latent fingerprints: 1,2-indanedione has come of age

The performance of 1,2-indanedione as a latent fingerprint reagent on some types of paper was found to exceed that of DFO, the leading fluorogenic fingerprint reagent. It even exceeds the performance of the sequence, DFO, followed by ninhydrin. No new prints could be observed when ninhydrin was applied after indanedione. On a large number of actual exhibits (used checks) indanedione developed 46% more identifiable prints than the sequence DFO-ninhydrin. A standard procedure for fingerprint development by indanedione is proposed. Best results are obtained with a 0.2% indanedione solution in HFE7100 solvent containing 7% ethyl acetate, but no acetic acid. It can be recommended to start using 1,2-indanedione, which is already commercially available, in actual fingerprint casework.