Consistency and reproducibility in fingermark deposition

A review of the available literature and previous research has suggested that there are several factors associated with the deposition of friction ridge skin marks that can affect the quality of the resultant marks, including the quantity of force applied, the angle of friction ridge and surface contact and the duration of friction ridge and surface contact. A device referred to as a fingerprint sampler was designed and constructed to facilitate the deposition of fingermarks for research projects. Fingermarks were deposited with and without the fingerprint sampler and examined for evidence of distortion. The quality of the marks was also assessed. The results of this study suggested that the fingerprint sampler deposited fingermarks without distortion caused by some physical factors associated with deposition and that the marks were of a statistically significantly higher quality than marks deposited without its use.     

Application of the hexagon-OBTI test and the RSID blood test for the determination of the post-mortem interval of bone samples

In this serial experiment, five human bones with known post-mortem intervals (PMI) in a soil environment from five different epochs (0.2 to approximately 2000 years) were tested in a blind setup with two established rapid tests for the identification of human blood traces (Hexagon-OBTI test and RSID blood test). Based on previous study results concerning the usability of the Luminol test for the first assessment of the PMI of osseous remains, the question arising was whether those test procedures, which are highly sensitive for the detection of human blood components, could also be used to narrow down the post-mortem interval. Five test series were conducted applying modified standard protocols of the manufactures. The aim was to find out whether with prior reaction steps or a prolonged time of incubation hemoglobin or its metabolites can be dissolved from the bone and positive test results can be achieved dependent on the PMI. Four test series yielded negative results for all bone samples and one test series a uniformly weak positive result. The results indicate that rapid tests based on the detection of blood are not suitable for the determination of the PMI of bone samples despite the modification of the standard protocols. Further thorough research is required to clarify the postmortem degradation of hemoglobin in bones.     

The effect of cleaning agents on the ability to obtain DNA profiles using the Identifiler™ and PowerPlex® Y multiplex kits

Abstract: A year after the introduction of Identifiler? into the forensic DNA laboratories of the Institute of Environmental Science and Research Limited (ESR), increasing occurrences of dropout of the three loci, D7S820, D18S51, and FGA, were observed in samples where the DNA was not degraded and sufficient DNA was present that full DNA profiles were to be expected. The dropout was either partial or complete at these loci. Full profiles could sometimes be obtained by reamplification of samples using the same input amount of DNA. After a thorough investigation of the methods and procedures used in the laboratory, the cause of this inhibition was identified as the cleaning agent TriGene? ADVANCE. This was determined after the deliberate addition of varying amounts of different cleaning reagents into the DNA amplification reactions. At concentrations of 0.004% TriGene? ADVANCE caused inhibition resulting in tri‐loci dropout. At concentrations of 0.04% and higher, complete inhibition was observed. An effect was also seen on the amplification of samples using the Y STR profiling system PowerPlex^®Y. This work highlights the importance of checking all reagents and chemicals prior to use, even those with no apparent direct influence on the DNA profiling process.     

Optimized Development of Sebaceous Fingermarks on Nonporous Substrates with Conformal Columnar Thin Films

A form of physical vapor deposition, called the conformal‐evaporated‐film‐by‐rotation (CEFR) method, was optimized for the conformal deposition of columnar thin films (CTFs) on sebaceous fingermarks. Relying on the surface topology of the fingermark, the CTF development technique is different from traditional development techniques. After the optimization of the development conditions, the CTF development technique was found to be superior to traditional development methods on several nonporous substrates: the smooth side of Scotch^® Multitask, Gorilla^®, and Scotch^® Duct tapes; clear and black soft plastics; stained and sealed walnut and cherry woods; partial bloody fingermarks on stainless steel; and discharged cartridge casings. It was equally as good as other development techniques on other substrates, but worse on a few. The optimization study is expected to assist in designing a mobile CEFR apparatus capable of on‐scene development of fingermarks.     

The Role of Overall Organizational Justice Perceptions Within the Four-Dimensional Framework

Given the recent interest in a global model of organizational justice, the purpose of the present paper is to examine the role of overall justice within Colquitt’s (J Appl Psychol 86:386–400, 2001) four-dimensional framework. In two studies (using a student and professional sample), confirmatory factor analysis results supported a five-factor model of justice. Analyses demonstrated that overall justice is likely an independent construct, can be predicted from the facet measures of justice, and is not a second-order hierarchical construct. In both studies, structural equation modeling indicated that overall justice partially mediated the relationship between the four dimensions of justice and both global and specific outcomes examined by Colquitt (2001) and Ambrose and Schminke (J Appl Psychol 94:491–500, 2009), respectively. Taken together, this research demonstrates that there is a need for both overall justice and the four justice dimensions in comprehensive models of organizational justice. Implications for research and practice are discussed.     

When Gender Matters: Macro-dynamics and Micro-mechanisms

Does candidate sex matter to general election outcomes? And if so, under what conditions does sex exert an effect? Research conducted over the past 40 years has asserted an absence of a sex effect, consistently finding that women fare as well as men when they run. Nevertheless, this scholarship neglects sex-based differences in candidate valence, or non-policy characteristics such as competence and integrity that voters intrinsically value in their elected officials. If women candidates hold greater valence than men, and if women’s electoral success stems from this valence advantage, then women candidates would be penalized if they lacked the upper hand on valence. Recent research at the macro-level reports a 3 % vote disadvantage for women candidates when valence is held constant (Fulton, Political Res Q 65(2):303–314, 2012), but is based on only one general election year. The present study replicates Fulton’s (Political Res Q 65(2):303–314, 2012) research using new data from a more recent general election and finds a consistent 3 % vote deficit for women candidates. In addition, this paper extends these findings theoretically and empirically to the micro-level: examining who responds to variations in candidate sex and valence. Male independent voters, who often swing general elections, are equally supportive of women candidates when they have a valence advantage. Absent a relative abundance of valence, male independents are significantly less likely to endorse female candidates. If correct, the gender affinity effect is asymmetrical: male independent voters are more likely to support men candidates, and less likely to support women, but female independents fail to similarly discriminate.     

Acting Like It Matters: A Scoping Review of Simulation in Child Welfare Training

Simulation-based training is often used to prepare health practitioners and is increasingly employed to train child welfare workers. This scoping review systematically searched the published and grey literature for studies that evaluated training for child welfare practitioners and used simulation methods that included standardized actors. Three studies met inclusion criteria, all documenting improvement in participants' use of specific skills. Other outcomes were mixed, possibly reflecting the heterogeneity of samples, study methods, measures, training of actors, theoretical frameworks, and content areas. Though results were mostly positive, the small number of studies indicates a substantial need for further research.