Soft tissue radiography in determining contact and near-contact gunshot wounds.

Contact and near-contact gunshot wounds ordinarily show distinctive gunpowder patterns, muzzle imprints, or tearing of the skin. Microscopic and chemical examination have been used to estimate firing distances. A new method that utilizes soft tissue radiography is described. Nonjacketed lead bullets deposit a pattern of fragments and residues in tissue circumscribing contact and close gunshot wounds. Various patterns are presented to contrast the appearance of contact from distant gunshot wounds using various firearms and different types of bullets. This procedure may be used as an adjunct in the determination of contact and close gunshot wounds.     

The Appointment and Removal Process for judges in Argentina: The Role of Judicial Councils and Impeachment Juries in Promoting Judicial Independence

This article explores the conditions that allow judicial councils and impeachment juries to promote judicial autonomy. In theory, these bodies intervene in the appointment and removal of judges in order to reduce executive control over court composition, thereby promoting judicial independence. Using the case of Argentina at the federal and the subnational levels, this study demonstrates that competitive politics enhances the capacity of judicial councils and impeachment juries to bolster judicial autonomy. Interparty competition provides incentives for the executive to develop a meaningful system of checks and balances, which includes an independent judiciary that can check executive power. In contrast, monolithic party control—defined as a prolonged period of unified government under a highly disciplined party—permits the executive to maintain a monopoly on power and thereby control judicial appointments and removals.     

Measuring Alcohol Expectancies in Youth

Beliefs about the consequences of using alcohol, alcohol expectancies, are powerful predictors of underage drinking. The Alcohol Expectancies Questionnaire-Adolescent form (AEQ-A) has been widely used to measure expectancies in youth. Despite its broad use, the factor structure of the AEQ-A has not been firmly established. It is also not known whether it assesses similar constructs (i.e., measurement invariance) between boys and girls. This article reports on a confirmatory factor analysis (CFA) of a shortened version of the AEQ-A with 310 youth, ages 10–16, to determine whether a two factor, positive and negative expectancy structure held for this sample and to test measurement invariance across gender. The results support evidence of a 2-factor, positive and negative structure for the abbreviated version of the AEQ-A and show that it assesses equivalent alcohol expectancy constructs among males and females. These findings have important implications for cognitive based approaches to alcohol prevention.Florida State University College of Social Work. She received her Ph.D. in Social Work from the University of North Carolina at Chapel Hill. Her major research interests are youth at risk, substance use prevention, and family engagement in prevention interventionsFlorida State University College of Medicine. She received her Ph.D. in Social Psychology from Arizona State University. Her major research interests are women's health, disease prevention, and health communication.Prevention Research Center, Pacific Institute for Research and Evaluation. She received her Ph.D. in Criminal Justice from the University at Albany. Her major research interests are family-based prevention strategies for adolescent alcohol, drugs, and sexual risk taking; women's alcohol, and other drug problems; prevention of young adult alcohol and drug abuse, risky sexual behavior, and violence.     

Immunohistochemical analysis of forensic evidence from a double homicide

We report the use of immunohistochemical staining for analysis of forensic evidence from a double homicide. A 38-year-old woman and her 7-year-old daughter were murdered by multiple blows to the head and face with a tomahawk, resulting in multiple fragments of brain tissue scattered about the murder scene. The victims' husband and father was the main suspect, who maintained that he was out of town on business during the evening of the murders. However, a shirt taken from the suspect's car on the morning after the murders (secured by the police before the suspect visited the murder scene) was found to have two small stains. DNA analysis on the stains showed the presence of the deceased wife's DNA, and immunohistochemical stains on shirt fragments conclusively documented the presence of deep central nervous system tissue, providing the critical piece of evidence needed to arrest and prosecute the suspect. This report demonstrates that shirt or similar cloth fragments can be processed into paraffin blocks and subsequently immunostained to search for and classify types of tissue fragments that may be present on the fabric.     

Characterization of the Caucasian haplogroups present in the SWGDAM forensic mtDNA dataset for 1771 human control region sequences. Scientific Working Group on DNA Analysis Methods

Currently, the Scientific Working Group on DNA Analysis Methods (SWGDAM) mtDNA dataset is used to infer the relative rarity of mtDNA profiles (i.e., haplotypes) obtained from evidence samples and for identification of missing persons. The Caucasian haplogroup patterns in this forensic dataset have been characterized using phylogenetic methods. The assessment reveals that the dataset is relevant and representative of U.S. and European Caucasians. The comparisons carried out were both the observation of variable sites within the control region (CR) and the selection of a subset of these sites, which partition the variation within human mtDNA control region sequences into clusters (i.e., haplogroups). The aligned sequence matrix was analyzed to determine both single nucleotide polymorphisms (SNPs) in a phylogenetic context, as well as to check and standardize haplogroup designations with a focus on determining the characters that define these groups. To evaluate the dataset for forensic utility, the haplogroup identifications and frequencies were compared with those reported from other published studies.     

Cannabinoid Hyperemesis Syndrome: Reports of Fatal Cases

Cannabinoid hyperemesis syndrome (CHS) is one of the more clinically challenging effects of cannabis consumption. It is characterized by cyclic attacks of nausea and vomiting in chronic cannabinoid users and learned behavior of compulsive hot bathing. The deaths of a 27‐year‐old female, a 27‐year‐old male, and a 31‐year‐old male with a history of CHS are reported. The decedents had a history of cyclical nausea and vomiting, chronic cannabinoid use and negative laboratory, radiological and endoscopic findings. All presented to the emergency department with nausea and vomiting in the days preceding death and were treated symptomatically. Toxicological analysis revealed tetrahydrocannabinol in postmortem blood. The cause of death of two of the three cases was attributed to CHS. CHS was appreciated in the third case but was not the cause of death. These three cases demonstrate the importance of recognizing CHS as a potential cause or contributing factor to death in cannabinoid user.