Association of Ignitable Liquid Residues to Neat Ignitable Liquids in the Presence of Matrix Interferences Using Chemometric Procedures*,†

Abstract: In fire debris analysis, weathering of ignitable liquids and matrix interferences can make the identification of ignitable liquid residues (ILRs) difficult. An objective method was developed to associate ILRs with the corresponding neat liquid with discrimination from matrix interferences using principal components analysis (PCA) and Pearson product moment correlation (PPMC) coefficients. Six ignitable liquids (gasoline, diesel, ultra pure paraffin lamp oil, adhesive remover, torch fuel, paint thinner) were spiked onto carpet, which was burned, then extracted using passive headspace extraction, and analyzed by gas chromatography‐mass spectrometry. Both light and heavy burn conditions were investigated. In the PCA scores plot, ignitable liquids were discriminated based on alkane and aromatic content. All ILRs were successfully associated with the corresponding neat liquid using both PCA and PPMC coefficients, regardless of the extent of burning. The method developed in this research may make the association of ILRs with corresponding neat liquids more objective.     

Blind lineup administration as a prophylactic against the postidentification feedback effect

Confidence and other testimony-relevant judgments may be distorted when witnesses are given confirming postidentification feedback, and double-blind procedures-wherein the lineup administrator does not know the identity of the suspect-are a commonly proposed, but untested, remedy for this effect. In the current study, mock witnesses viewed a staged crime video followed by a target-present or target-absent lineup where the administrator was or was not presumed to know the identity of the suspect. After making an identification decision, witnesses were or were not given realistic, but nonidentification-specific, feedback, and then confidence and other judgments were assessed. A significant interaction was found between blind condition and feedback such that feedback inflated confidence and other judgments in presumed nonblind conditions only; feedback had no effect on participants in presumed blind conditions. As predicted by the selective cue integration framework-a theoretical model suggested to explain the interaction between presumed blind administration and feedback-this interaction was significant only for inaccurate participants. These results suggest that blind administration may serve as a prophylactic against the negative effects of postidentification feedback. In addition, the effectiveness of our subtle feedback in influencing judgments suggests that lineup administrators should take care not to provide any feedback to eyewitnesses. (PsycINFO Database Record (c) 2012 APA, all rights reserved).     

Paying for the crimes of their children: Public support of parental responsibility

Parental responsibility laws, varying greatly within and among the states, appeared as one answer to the questions surrounding juvenile crime. Although these laws would seem to garner great public support under the new punitive attitude toward juveniles, no recent empirical studies were conducted on this topic. The current research examined public support of parental responsibility for crimes children commit. Contrary to expectations, public support was found to be relatively low. The public did place some responsibility on the parents when a juvenile crime occurred; however, agreement with blaming and punishing the parents was low. Political ideology and educational status served as possible predictors of support. Overall, however, demographic variables proved not predictive in determining who would support these measures.     

Public Sector Priority Setting Using Decision Support Tools

The public sector is in transition in many countries, including New Zealand, and many government departments have been restructured so as to increase transparency and accountability in their decision‐making by implementing fundamental changes to governance, accountability regimes and information systems. New frameworks are also needed for tasks such as priority setting, and this paper describes the framework developed to assist the then NZ Ministry of Agriculture (MAF) in setting priorities for the allocation of research funds. This comprised a participative process including a series of workshops using both GroupSystems software for electronic meeting support and Visual Interactive Sensitivity Analysis (VISA) software to facilitate a multi‐criteria decision analysis.