Assessing the potential of bacterial DNA profiling for forensic soil comparisons

A pilot study was undertaken to evaluate DNA profiling of the bacterial community in soil as an alternative to geological methods for forensic soil comparisons. Soil samples from three different ecosystems were compared, and the variation within and between ecologically different sites was determined by using terminal restriction fragment (TRF) analysis of 16S ribosomal DNA. Comparison of TRF profiles revealed that samples from within a specific ecosystem (e.g., a field) showed a significantly higher similarity to each other than to those from another ecosystem (e.g., a forest). In addition, some profile features were unique to specific ecosystems. These features may allow the determination of characteristic profiles that will facilitate identification of ecologically different sites, so that a given sample collected from a suspect could be identified as originating from, for example, a field, rather than a forest. The implications of these preliminary findings for forensic investigations are discussed.     

Street-level drug law enforcement: A meta-analytical review⋆

Our paper presents the results of a meta-analytical review of street level drug law enforcement. We conducted a series of meta-analyses to compare and contrast the effectiveness of four types of drug law enforcement approaches, including community-wide policing, problem-oriented/partnership approaches that were geographically focused, hotspots policing and standard, unfocused law enforcement efforts. We examined the relative impact of these different crime control tactics on street-level drug problems as well as associated problems such as property crime, disorder and violent crime. The results of the meta-analyses, together with examination of forest plots, reveal that problem-oriented policing and geographically-focused interventions involving cooperative partnerships between police and third parties tend to be more effective at controlling drug problems than community-wide policing efforts that are unfocused and spread out across a community. But geographically focused and community-wide drug law enforcement interventions that leverage partnerships are more effective at dealing with drug problems than traditional, law enforcement-only interventions. Our results suggest that the key to successful drug law enforcement lies in the capacity of the police to forge productive partnerships with third parties rather than simply increasing police presence or intervention (e.g., arrests) at drug hotspots.

Child physical abuse and self-perceived social isolation among adolescents

This research examines the connection between physical abuse and social isolation. Using data from the National Youth Survey, a measure of self-perceived social isolation was constructed indicating the extent to which respondents feel detached from their friends and from school. Those who had experienced violence were predicted to be more isolated than those who had not. Results strongly supported the hypothesis, controlling for theoretically relevant variables. Explanation is provided in terms of damage to attachment skills, social competence, and self-esteem concomitant to being a victim of abuse. Males were more socially isolated than females, and Hispanics more than Whites. Children with involved parents were less socially isolated; those whose parents experienced normlessness were more isolated. Children who recently experienced a stressful event or were from riskier neighborhoods were more isolated. The number of children in the family was positively related to isolation. Social isolation decreases between seventh and eighth grades.     

HIV-positive person who did not disclose status convicted of attempted aggravated assault

On 18 September 2003, the Supreme Court of Canada released its unanimous decision in Williams. This is the first case on the issue of criminal liability for HIV exposure decided by the court since its 1998 decision in the Cuerrier case. Williams raised the issue of whether persons with HIV who have unprotected sexual intercourse without disclosing their status to a sexual partner who might already have been infected with the virus, can be convicted of aggravated assault or attempted aggravated assault. The Supreme Court decided that only a charge of attempted aggravated assault could stand. The decision is also significant because the Supreme Court's comments on two ancillary issues may lead to a significant extension of the criminal law related to HIV transmission or exposure.     

Filters of influence: The help-seeking process of African American single mothers living in poverty seeking mental health services for their children

There are a disproportionate number of African American children living in poverty who are in need of mental health services. African American children who live in poverty tend to underutilize mental health treatment due to the barriers their caregivers face; however, far less research has been conducted on the percentage of children who do access mental health treatment and the experiences of their caregivers in maneuvering through the barriers in their environments. This grounded theory study systematically generated a help-seeking theory that was constructed through the experiences of single African American mothers living in poverty who accessed mental health treatment for their children.