Analysis of condom lubricants for forensic casework

The detection of DNA is inhibited in cases of sexual assault involving condom use. Trace evidence, including condom lubricant residues, provides crucial associative evidence in such cases. The existing Fourier transform infrared spectroscopy (FTIR) methods for lubricant analysis and detection are limited with regard to sensitivity and discrimination. The aim of this research was to establish a new method as an alternative to FTIR for the analysis of condom lubricant residues. Pyrolysis gas chromatography-mass spectrometry (PyGC-MS) and GC-MS are highly sensitive methods of analysis for a wide range of chemical substances. PyGC-MS and GC-MS were used to analyze condom lubricants in standard solution, from clean swabs and from postcoital swabs. Pyrolysis of polydimethylsiloxane (PDMS) lubricant forms cyclic products known as cyclic dimethyl siloxanes (DMS), which are separated and detected by the GC-MS. The polyethylene glycol (PEG) lubricant can be analyzed by GC-MS directly from solution. The methods of extraction and analysis presented in this paper were shown to be significantly more sensitive than FTIR for the analysis of PDMS and PEG condom lubricants. PDMS was detected as low as 1 mug in standard solution and from clean swabs using the PyGC-MS method. PEG was detected as low as 0.5 microg from standard solution and 50 mug from clean swabs using the GC-MS method. Unfortunately, we were unable to provide further discrimination between condom brands and subbrands. The methods established throughout the research were used successfully to detect condom lubricants from donated postcoital swabs. Lubricants were detected in abundance on swabs 12 h postcoitus. Recommendations are made regarding implementation of new methods for routine analysis of casework samples along with strict pyrolysis interpretation criteria to minimize the possibility of misinterpretation of false positives.     

Murder Followed by Suicide: A Newspaper Surveillance Study Using the New York Times Index

Abstract: Murder–suicide is a relatively uncommon event but as reported by the New York Times, it has occurred and continues to occur yearly. Previous research has indicated that those who commit murder–suicides tend to be men, are in or have been in an intimate relationship with the victim, victims tend to be women, and a firearm is most likely to be used. This study uses a newspaper surveillance methodology to examine such cases. Articles from the New York Times as found in the New York Times Index were coded, analyzed, and examined. The cases, 166 in total, support the findings from prior research. The trend data was examined by cross tabulations and chi‐square analysis. The findings suggest that murder–suicides are rare events and when they occur they usually involve a male perpetrator and an intimate partner victim who is either a wife or girlfriend with the event occurring in a private home. A firearm is the most commonly used method for both murders and suicides, particularly if there was more than one murder victim. The authors conclude by suggesting that future research should focus on using the forthcoming data resource in the CDC’s National Violent Death Reporting System (NVDRS) to examine the occurrence of murder–suicide.     

THE DIVIDED WORLD OF THE CHILD: DIVORCE AND LONG‐TERM PSYCHOSOCIAL ADJUSTMENT

This study evaluated the extent to which divorce creates the “divided world of the child,” as well as consequences of this “divided world” for long‐term adjustment. An ethnically diverse sample of 1,375 young‐adult university students completed retrospective measures of parental nurturance and involvement, and current measures of psychosocial adjustment and troubled ruminations about parents. Results indicated that reports of maternal and paternal nurturance and involvement were closely related in intact families but uncorrelated in divorced families. Across family forms, the total amount of nurturance or involvement received was positively associated with self‐esteem, purpose in life, life satisfaction, friendship quality and satisfaction, and academic performance; and negatively related to distress, romantic relationship problems, and troubled ruminations about parents. Mother‐father differences in nurturance and involvement showed a largely opposite set of relationships. Implications for family court practices are discussed.     

Criminological Research and the Death Penalty: Has Research by Criminologists Impacted Capital Punishment Practices?

American Journal of Criminal Justice - At the request of the SCJA president this paper addresses five questions. Does criminological research make a difference relative to the death penalty? - If...     

Scholarship—the new dimension to equity issues for academic women

Over the last 25 years, Canadian women have made significant inroads to the academy as students, faculty, and administrators. Their contribution is reflected in curriculum that now addresses women and through the development of undergraduate and graduate programs in women's studies. Above all, certain aspects of women's work in the academy have challenged masculinist notions of research methodology and pedagogy. In spite of these gains and contributions, women largely remain in the “A” ranks in academe—assistant, associate, acting. This article argues, and demonstrates through personal accounts, that current definitions of scholarship, widely held in the academy, prevent the advancement of women precisely because some feminist models of research and pedagogy present a challenge to academic hierarchy. Hence, the new equity challenge facing academic women is found in definitions of scholarship used for evaluation in tenure and promotion cases.     

Chemically sensitized erythrocytes for hemagglutination reactions.

The use of chemically modified indicator erythrocytes for hemagglutination reactions can result in increased sensitivity. Treatment of erythrocytes with polyvinylpyrrolidone (PVP) or dextran T40 (10% weight/volume) induces changes in the cell surface in the form of extensions and blebbing, thereby increasing the surface area. These sensitized cells can be used in forensic science when detection or quantitation of erythrocyte surface reacting antibodies is important. The effect of altering membrane lipid fluidity on erythrocyte surface antigens has also been investigated. Treatment of cells with a reagent that increases the membrane ratio of cholesterol to phospholipid results in enhanced hemagglutination capacity despite the lack of extensive spiculation.