Changes in illicit cocaine hydrochloride processing identified and revealed through multivariate analysis of cocaine signature data

For nearly 30 years, the methods utilized in illicit cocaine hydrochloride production have remained relatively consistent. Cocaine hydrochloride is typically produced one kilogram at a time. As a result, each individual kilogram is unique and distinct from other kilograms in any particular seizure based on the total alkaloid profile, occluded solvent profile, and isotopic signature. Additionally, multi-kilogram cocaine seizures are often comprised of cocaine from several different coca growing regions. There has been a documented shift in this type of processing based on the recent analysis of a large cocaine seizure in the Eastern Pacific. Signature analyses of samples from 21 kg randomly selected from a 517 kg seizure were virtually identical. Triplicate analyses of each sample via gas chromatography with flame ionization detection, static headspace gas chromatography mass spectrometry, and isotope ratio mass spectrometry were completed. An initial outlier evaluation of the data and an in-depth univariate analysis indicated there was no statistically significant difference among the 21 samples at the 95% confidence interval. Principal components analysis did reveal consistent minor deviations between the samples and known authentic data from the Nariño coca growing region of Colombia. These deviations were only observed on the latter principal components and could be explained by differences in solvent selection during cocaine hydrochloride processing. Chemical analyses in addition to a thorough statistical evaluation suggest a shift in the traditional small-batch method of cocaine processing to a multi-kilogram, high throughput approach.     

Diversifying the police applicant pool: motivations of women and minority candidates seeking police employment

Given the media attention to police killings of unarmed men of color, police agencies have increased their focus on the diversity of their applicant pools. Despite their efforts, policing leaders across the United States have cited challenges in recruiting a diverse police force and are exploring evidence-based solutions. However, the bulk of the literature on motivation to seek a career in policing is dated and includes small samples of women and minority respondents. The purpose of this study is to provide contemporary insight into reasons of women and minority candidates for applying to a police department. Thus, this study focuses on women and minority applicants to a large policing agency in the northeastern United States, asking respondents an open-ended question about their motivation to apply. Policing as a childhood dream, making a difference in the community and the opportunity to help people, and believing policing was a good transition from military to civilian life were the most commonly cited reasons for applying. Salary, benefits and job security were the least cited reasons for applying for a police position. Other findings and policy implications are discussed.     

The Crime and Threat Image Set (CaTIS): a validated stimulus set to experimentally explore fear of crime

Objectives

Fear of crime may develop in response to crime specifically (the narrow pathway) or may be a projection of broader threats (the broad pathway). New approaches are needed to examine how crime and threat, independently and in combination, influence people’s fear. To address this need, we created, evaluated, and validated an image set that varied across the dimensions of threat and crime.

Method

We used a 2 (Threat: high vs. low) × 2 (Crime: high vs. low) within-subjects factorial design. In three studies, participants (N = 24, 29, and 176, respectively) gave threat, crime, and fear ratings towards images. Participants also completed two traditional fear of crime measures and a measure of anxiety. Two evaluation studies explored the suitability of 178 images to produce a final set of 80 images (20 in each of the four categories). We validated this final set of 80 images in a third study.

Results

The validated Crime and Threat Image Set (CaTIS) contains 78 images across four categories: threat-and-crime (high-crime, high-threat), threat-only (low-crime, high-threat), crime-only (high-crime, low-threat), and neutral (low-crime, low-threat). There were significant main effects of threat and crime, and an interaction between Threat × Crime, on participants’ fear ratings. Participants’ own ratings of threat—but not crime—had a strong relationship with their fear ratings.

Conclusions

Threat had a stronger influence on participants’ fear ratings than crime. Thus, what is typically referred to as fear of crime may reflect broader fear. Further research with the CaTIS could explore the expression of this fear.

     

A randomized trial testing deviant modeling,peer gender,and theft: replication and extension

Journal of Experimental Criminology - Replicate previous experimental findings on the causal effect of deviant peer modeling and assess whether the gender of peer models is an important determinant...     

Direct PCR Improves the Recovery of DNA from Various Substrates

This study reports on the comparison of a standard extraction process with the direct PCR approach of processing low-level DNA swabs typical in forensic investigations. Varying concentrations of control DNA were deposited onto three commonly encountered substrates, brass, plastic, and glass, left to dry, and swabbed using premoistened DNA-free nylon FLOQswabs^™. Swabs (n = 90) were either processed using the DNA IQ^™ kit or, for direct PCR, swab fibers (~2 mm²) were added directly to the PCR with no prior extraction. A significant increase in the height of the alleles (p < 0.005) was observed when using the direct PCR approach over the extraction methodology when controlling for surface type and mass of DNA deposited. The findings indicate the potential use of direct PCR for increasing the PCR product obtained from low-template DNA samples in addition to minimizing contamination and saving resources.     

What is Fair Punishment for Alex or Ahmed? Perspective Taking Increases Racial Bias in Retributive Justice Judgments

Previous research frequently found that perspective taking may reduce various sorts of racial biases. In the present research, we propose that perspective taking may increase racial bias in the specific context of retributive justice judgments, that is, evaluations of what punishment is considered fair for offenders. In two studies, we manipulated whether or not participants took the perspective of a target offender, who was named either Alex or Ahmed. Results revealed evidence for racial bias under conditions of perspective taking in both studies: Perspective taking increased punishment for Ahmed, but not for Alex, in a theft case (Study 1). Furthermore, perspective taking decreased punishment for Alex, but not for Ahmed, in the case of less severe offense that is less clearly intentional (Study 2). The consequence is similar in both studies: More severe retributive justice judgments for Ahmed than for Alex under conditions of perspective taking.     

The HOPE VI Program: What about the residents?

Abstract

During the 1990s, the federal government dramatically changed its policy on housing the poor. Under the HOPE VI (Housing Opportunities for People Everywhere) Program, the U.S. Department of Housing and Urban Development intended to address the concentration of troubled low‐income households in public housing by moving away from its reliance on project‐based assistance and promoting instead the construction of mixed‐income housing and the use of housing subsidies.

This article presents important evidence from two systematic, multicity studies on how the original residents of HOPE VI developments have been affected by this radical new approach to public housing. While many residents have clearly benefited, the findings raise critical questions about whether the transformation of public housing will achieve its potential as a powerful force for improving the lives of low‐income families.     

A Comparison of Acculturation Measures Among Hispanic/Latino Adolescents

Acculturation has been associated with numerous health and social outcomes among Hispanic/Latino adolescents. Various self-report scales have been used to measure acculturation, making comparisons of results across studies difficult. This study administered several commonly-used acculturation scales to 221 Hispanic/Latino 9th grade students in Los Angeles. Although all of these scales purport to measure acculturation, the correlations among the scales, and their correlations with language usage measures, were modest. As expected, higher scores on Hispanic/Latino orientation scales (or lower scores on U.S./White orientation scales) were associated with higher levels of ethnic identity formation. Results indicate that these acculturation scales may measure different aspects of the complex phenomenon of acculturation. For example, purely language-based measures shared only small amounts of variance with more comprehensive measures. Additional research is needed to create and validate acculturation measures for adolescents. Jennifer B. Unger, Ph.D. is an Associate Professor of Preventive Medicine at the University of Southern California Keck School of Medicine. She is the principal investigator of Project RED, which is examining parent-child acculturation patterns and substance use among Hispanic adolescents. Anamara Ritt-Olson, Ph.D. is a Research Associate in Preventive Medicine at the University of Southern California Keck School of Medicine. Karla Wagner, MA is a predoctoral student and research assistant in Preventive Medicine at the University of Southern California Keck School of Medicine. Daniel Soto, BA is the project manager on Project RED. Lourdes Baezconde-Garbanati, Ph.D. is an Associate Professor of Preventive Medicine at the University of Southern California Keck School of Medicine and a co-investigator on Project RED.     

A Growth Curve Analysis of the Joint Influences of Parenting Affect,Child Characteristics and Deviant Peers on Adolescent Illicit Drug Use

This study purports that parental rejection and warmth are critical to the development of adolescent drug use, and investigates a model that also considers children's vulnerability and deviant peer affiliations. It tests mediation through the proximal risk factor of deviant peers. Poisson growth curve modeling was used to examine participants from the Canadian National Longitudinal Survey of Children and Youth (NLSCY; N=2194) over 4 waves. Results indicated that parental rejection was positively related to drug use, whereas parental warmth was negatively related to it. Both effects were significant when child ADHD symptoms were taken into account. Parental rejection and warmth had differential effects over time. Deviant peer affiliations were positively associated with drug use, did not have a differential influence over time, and did not mediate the other effects. There was significant between-individual (level 2) variability in drug use. Results are discussed in light of adolescent perceptions of parent-child relationships. Research Interests: social and emotional development; family processes; adolescent problem behaviours; main area of work is about understanding risk and protective factors in typical and atypical adolescent development Department of Human Development and Applied Psychology, University of Toronto, 252 Bloor Street West, Toronto, Ontario, M5S 1V6, Canada Research Interests: social and emotional development; family interaction; child psychopathology; main area of work is about understanding emotion processes in children and in family life that help us to understand psychopathology in childrenDepartment of Human Development and Applied Psychology, University of Toronto, 252 Bloor Street West, Toronto, Ontario, M5S 1V6, Canada     

Structural determination of the principal byproduct of the lithium-ammonia reduction method of methamphetamine manufacture

One common method of illicit methamphetamine manufacture utilizes an alkali metal, typically lithium, and liquid ammonia to chemically reduce ephedrine or pseudoephedrine to form methamphetamine. This method is often referred to as the lithium-ammonia reduction method or the Birch reduction method. While the hydroxyl group of ephedrine is more reactive than the aromatic ring, excess alkali metal and the presence of a proton source allow the formation of a cyclohexadiene byproduct not found in samples of methamphetamine produced from other manufacturing methods. A sample enriched in this byproduct was generated and characterized using nuclear magnetic resonance (NMR) spectroscopy, gas chromatography-mass spectrometry (GC-MS), infrared (IR) spectrophotometry, and ultraviolet (UV) spectrophotometry. The chemical structure of this byproduct was determined to be 1-(1',4'-cyclohexadienyl)-2-methylaminopropane (CMP).