Detection of nitro-organic and peroxide explosives in latent fingermarks by DART- and SALDI-TOF-mass spectrometry

The ability of two mass spectrometric methods, surface-assisted laser desorption/ionization-time of flight-mass spectrometry (SALDI-TOF-MS) and direct analysis in real time (DART-MS), to detect the presence of seven common explosives (six nitro-organic- and one peroxide-type) in spiked latent fingermarks has been examined. It was found that each explosive could be detected with nanogram sensitivity for marks resulting from direct finger contact with a glass probe by DART-MS or onto stainless steel target plates using SALDI-TOF-MS for marks pre-dusted with one type of commercial black magnetic powder. These explosives also could be detected in latent marks lifted from six common surfaces (paper, plastic bag, metal drinks can, wood laminate, adhesive tape and white ceramic tile) whereas no explosive could be detected in equivalent pre-dusted marks on the surface of a commercial lifting tape by the DART-MS method due to high background interference from the tape material. The presence of TNT and Tetryl could be detected in pre-dusted latent fingermarks on a commercial lifting tape for up to 29 days sealed and stored under ambient conditions.     

Safety in Intimate Partnerships: The Role of Appraisals and Threat

For most intimate partners, safety is an important goal and basic need. How a partner perceives safety has an impact on what happens in the relationship, and this will in turn affect the responses from the other partner. Lack of safety can provoke negative emotions and actions which can lead to relationship deterioration and violence. However, little is known about this process from the insider’s perspective. In this study, constructivist grounded theory methods were used to analyze interviews from individuals (n = 37) to better understand individual appraisals of relational safety. The results include a theory that illustrates the process of relational safety and threat. This model articulates how certain relational conditions precede a perception of safety or threat, which then leads to corresponding actions. Implications of the model include a focus on interaction and context when assessing for safety and abuse, as well as the importance of self regulation.     

AMBER Alerts: Are School-Type Photographs the Best Choice for Identifying Missing Children?

We investigated how well adults could recognize the faces of children when they differed in appearance from photographs shown in an alert. College students in three studies saw a mock AMBER Alert while watching a television show. The children appeared either well-groomed with positive affect (as in a school photograph) or disheveled with poor affect (as abducted children might appear). Recognition accuracy and confidence were significantly lower when the faces differed in appearance from the alert displayed during the television show. Thus, AMBER Alerts may be more effective if they are accompanied by more than one type of photograph of a missing child, particularly if a photograph is shown in which the child does not appear well-groomed and happy.     

STR melting curve analysis as a genetic screening tool for crime scene samples

In this proof-of-concept study, high-resolution melt curve (HRMC) analysis was investigated as a postquantification screening tool to discriminate human CSF1PO and THO1 genotypes amplified with mini-STR primers in the presence of SYBR Green or LCGreen Plus dyes. A total of 12 CSF1PO and 11 HUMTHO1 genotypes were analyzed on the LightScanner HR96 and LS-32 systems and were correctly differentiated based upon their respective melt profiles. Short STR amplicon melt curves were affected by repeat number, and single-source and mixed DNA samples were additionally differentiated by the formation of heteroduplexes. Melting curves were shown to be unique and reproducible from DNA quantities ranging from 20 to 0.4 ng and distinguished identical from nonidentical genotypes from DNA derived from different biological fluids and compromised samples. Thus, a method is described which can assess both the quantity and the possible probative value of samples without full genotyping.     

Quantification of the subpubic angle in South Africans

Due to the high crime rate in South Africa, forensic anthropologists are increasingly approached to aid in the identification of skeletonized remains, with sex and population affinity assignment being some of the most critical tasks they face. For over a century, the pelvis has been known to be one of the most sexually dimorphic bones of the human body and the subpubic angle is one of the most accurate, albeit scarcely quantified, features thereof. Hence, the aim of this study was to quantify the size of the subpubic angle and compare it between male and female South Africans of African (black) and European (white) descent. One hundred and forty five (145) pelves were selected, consisting of 68 white (43 male and 25 female) and 77 black South Africans (44 male and 33 female), from the Raymond A. Dart Collection of Human Skeletons housed at the University of the Witwatersrand, Johannesburg, South Africa. Each of the pelves were articulated and placed into a custom built stand for photographing. Measures of the subpubic angle from these digital images were subjected to numerous statistical analyses. Results indicated that significant differences exist between the sexes, as well as between the two population groups. For black individuals it was found that males generally possessed a subpubic angle of 74.9° or less, with larger values being indicative of the female sex. For white individuals, subpubic angles of 81.4° and less indicated males whilst larger values indicated females, with an average accuracy of 86% for both population groups. These results illustrate the advantages of using the subpubic angle to assist in the estimation of sex and population affinity and also reinforce the need for population specific parameters to be applied.     

Reforming election dates in Canada: Towards an explanatory framework

Since 2001, ten governments in Canada have passed fixed election date legislation. The typical assumption in the literature is that governments did so as a way to address public concerns about the undemocratic nature of calling and timing elections. This argument, however, does not explain the timing (that is, when the legislation was passed by each jurisdiction) of this policy change. We approach this puzzle deductively by applying the theoretical insights of multiple streams theory to the Canadian experiences. Our findings suggest that although all three streams were important, the political stream is crucial for explaining the timing of the legislation.     

Democracy@internet.asia? The challenges to the emancipatory potential of the net: Lessons from China and Malaysia

It is a commonly held view that, given the unique characteristics of the internet, it provides real opportunities for democratisation and political transformation, especially in societies where freedom of speech and expression is constrained by government controls. This article challenges this assumption by examining the impact of the internet in Asia with specific reference to China and Malaysia. In particular the article argues that to understand the impact of the internet on developing economies it is essential to examine the political economy of the internet-locally, regionally and globally. While the net may provide a new medium for dissent and opposition, its impact is offset by two principal factors. First, the existence of a marked digital divide between North and South (as well as the discrepancies that exist within specific countries in terms of gender, education and wealth) and second, by growing commercialisation.     

The Four Horsemen of Terrorism: It's Not Waves,It's Strains

David Rapoport's concept of Four Waves of terrorism, from Anarchist terrorism in the 1880s, through Nationalist and Marxist waves in the early and mid-twentieth century, to the present Religious Wave, is one of the most influential concepts in terrorism studies. However, this article argues that thinking about different types of terrorism as strains rather than waves better reflects both the empirical reality and the idea that terrorists learn from and emulate each other. Whereas the notion of waves suggests distinct iterations of terrorist violence driven by successive broad historical trends, the concept of strains and contagion emphasizes how terrorist groups draw on both contemporary and historical lessons in the development of their tactics, strategies, and goals. The authors identify four distinct strains in total—Socialist, Nationalist, Religious, and Exclusionist—and contend that it is possible to trace each strain back to a “patient zero” active in the 1850s.     

Worst Expert Testimony Ever

Much of the literature on expert testimony addresses ways to improve witness credibility. A smaller body of knowledge examines instances of testimony in which the expert makes stylistic or substantive errors. In the present paper, a case of expert testimony is presented in which an expert witness under the duress of strong cross-examinations lost emotional control and spoke inappropriately. The circumstances of the testimony are discussed and alternative paths towards managing such situations are presented.