STR analysis of artificially degraded DNA-results of a collaborative European exercise

Degradation of human DNA extracted from forensic stains is, in most cases, the result of a natural process due to the exposure of the stain samples to the environment. Experiences with degraded DNA from casework samples show that every sample may exhibit different properties in this respect, and that it is difficult to systematically assess the performance of routinely used typing systems for the analysis of degraded DNA samples. Using a batch of artificially degraded DNA with an average fragment size of approx. 200 bp a collaborative exercise was carried out among 38 forensic laboratories from 17 European countries. The results were assessed according to correct allele detection, peak height and balance as well as the occurrence of artefacts. A number of common problems were identified based on these results such as strong peak imbalance in heterozygous genotypes for the larger short tandem repeat (STR) fragments after increased PCR cycle numbers, artefact signals and allelic drop-out. Based on the observations, strategies are discussed to overcome these problems. The strategies include careful balancing of the amount of template DNA and the PCR cycle numbers, the reaction volume and the amount of Taq polymerase. Furthermore, a careful evaluation of the results of the fragment analysis and of automated allele calling is necessary to identify the correct alleles and avoid artefacts.     

Paradoxical bedfellows: Nihilism and human rights

This article identifies and considers the existence of a manifest, though often overlooked, paradox contained within the doctrine of human rights. The principal justifications for human rights are based upon the identification of variously conceived human characteristics, or attributes of human agency. Nevertheless, human rights have all too often been required to protect some human beings from being seriously harmed by other human beings. The justification for human rights envisages a single, universal community of human beings, whereas the actual application of human rights typically testifies to the existence of two, very distinct communities: victims and perpetrators. The single greatest impetus for the drafting of the Universal Declaration of Human Rights was the desire to prevent the re-occurrence of genocide. The modern human rights regime emerged out of mountains of human corpses. One would like to claim that the impetus for human rights became less urgent after the horrors of the Holocaust. Unfortunately, genocide has persisted and gross violations of human rights remain a feature of the geo-political landscape. Our need for protective human rights remains as urgent today as it did fifty years ago. This article accounts for this paradox and answers the question: Why is it that the ultimate justification and application of the doctrine of human rights is frustrated by members of the very species upon which the doctrine is based?     

The dragon breathes fire: Chinese organized crime in New York City

Although it is widely acknowledged that Chinese businesses are victims of extortion by Asian youth gangs, there is no reliable information to examine the patterns and social processes of the problem. This paper explores the structure of extortion and other forms of victimization based on surveys of (N=603) Chinese-owned businesses in three Chinatown neighborhoods in New York City. It focuses on the nature of Chinese crime groups, social contexts of gang extortion, social processes of victimization, and merchants' compliance or resistance to gang demands. Finally, the paper discusses the problems and prospects of Chinese criminality in America.Support for this research was provided by Grant 89-IJ-CX-0021 from the National Institute of Justice. The opinions are those of the authors and do not reflect the policies or views of the U.S. Department of Justice.     

The Salience of Social Contextual Factors in Appraisals of Police Interactions with Citizens: A Randomized Factorial Experiment

Objectives

Prior research indicates that public assessments of the manner in which the police exercise their authority are a key antecedent of judgments about the legitimacy of the police. In this study, the importance of context in influencing people’s assessment of police wrongdoing is examined.

Methods

A randomized factorial experiment was used to test how respondents perceive and evaluate police–citizens interactions along a range of types of situations and encounters. 1,361 subjects were surveyed on factors hypothesized to be salient influences on how citizens perceive and evaluate citizen interactions with police. Subjects viewed videos of actual police–citizen encounters and were asked for their evaluations of these observed encounters. Contextual primes were used to focus subjects on particular aspects of the context within which the encounter occurs.

Results

Structural equation models revealed that social contextual framing factors, such as the climate of police–community relations and the legality of the stop that led to the encounter, influence citizen appraisals of police behavior with effects comparable in size to and even larger than demographic variables such as education, race, and income.

Conclusions

These results suggest that the understandings and perceptions that people bring to a situation are important determinants of their assessment of police fairness. The police can positively influence citizen interpretations of police actions by striving to create a climate of positive police–community relationships in cities.     

Desistance and Legitimacy: The Impact of Offender Notification Meetings on Recidivism among High Risk Offenders

Legitimacy-based approaches to crime prevention assume that individuals will comply with the law when they believe that the law and its agents are legitimate and act in ways that are “fair” and “just.” Currently, legitimacy-based programs are shown to lower aggregate levels of crime; yet, no study has investigated whether such programs influence individual offending. Using quasi-experimental design and survival analyses, this study evaluates the effectiveness of one such program—Chicago’s Project Safe Neighborhoods’ (PSN) Offender Notification Forums—at reducing individual recidivism among a population of returning prisoners. Results suggest that involvement in PSN significantly reduces the risk of subsequent incarceration and is associated with significantly longer intervals that offenders remain on the street and out of prison. As the first study to provide individual-level evidence promoting legitimacy-based interventions on patterns of individual offending, out study suggests these interventions can and do reduce rates of recidivism.