Decomposition and insect succession of clothed and unclothed carcasses in Western Australia

The effect of clothing on carcass decomposition and patterns of insect succession onto remains were investigated in two separate years during autumn in Western Australia. The progression of decomposition differed between clothed and unclothed carcasses in both years of the study. The presence of clothing markedly prolonged the wet decay stage in both years with larval feeding occurring across the moist skin surface underneath clothing, as well as within and under the carcasses. Ambient temperatures were higher in the second year of the study and corresponded to marginally faster rates of decay throughout decomposition. Within years, insect arrival and oviposition were largely consistent between clothed and unclothed carcasses with a few notable exceptions. The green blow fly, Lucilia sericata Meigen (Diptera: Calliphoridae) oviposited one day earlier on clothed than unclothed carcasses in both years of the study. The black carrion fly, Australophyra rostrata Robineau-Desvoidy, (Diptera: Muscidae) colonised clothed carcasses in two distinct waves of succession but only one wave of ovipoistion was observed on unclothed carcasses in either year. Correspondingly, clothed carcasses supported larval feeding by A. rostrata for a longer duration than unclothed carcasses. Finally, dipteran larval masses were more widely distributed across the carcass surface and were present for a longer period of time on clothed carcasses than on unclothed carcasses in both years. Forensically relevant data detailing the seasonal pattern of insect succession onto clothed and unclothed decomposing remains in Western Australia are reported.     

Assessing Functional Impairment in ADHD: Concerns for Validity of Self-Report

Comprehensive diagnostic assessment of attention deficit hyperactivity disorder (ADHD) should include consideration of degree of impairment, and documentation of impairment is necessary to make service and accommodation determinations. While there has been increasing use of self-report as a way to document impairment, self-reported impairment could be just as vulnerable to invalid report as self-reported symptoms. We examined the influence of invalid self-report and invalid performance on report of functional impairment in a sample of 49 adults referred for evaluation for ADHD and/or learning disorder concerns. Overall, 26–59% of participants referred for evaluation endorsed at least moderate levels of impairment in the domains of understanding and communicating, household, and school/work. Individuals with evidence of invalid self-report of ADHD symptoms endorsed significantly higher levels of disability/impairment on the WHODAS, particularly in the domains of understanding and communicating, household, school/work, and participation in society. Further, individuals who failed a measure of performance validity reported significantly higher levels of impairment/disability, particularly in the domains of understanding and communicating, school/work, and participation in society. Results emphasize the need to assess for validity of self-report and performance in ADHD assessment. Since self-report of impairment may be suspect, clinicians should include data such as school records, past performance on high-stakes standardized testing, evidence of prior accommodations, and collateral reports before making diagnoses and/or recommendations regarding treatment or academic/workplace accommodations.     

Comparing Standard and Selective Degradation DNA Extraction Methods: Results from a Field Experiment with Sexual Assault Kits,

A growing number of U.S. cities have large numbers of untested sexual assault kits (SAKs) in police property facilities. Testing older kits and maintaining current case work will be challenging for forensic laboratories, creating a need for more efficient testing methods. Methods: We evaluated selective degradation methods for DNA extraction using actual case work from a sample of previously unsubmitted SAKs in Detroit, Michigan. We randomly assigned 350 kits to either standard or selective degradation testing methods and then compared DNA testing rates and CODIS entry rates between the two groups. Results and conclusions: Continuation‐ratio modeling showed no significant differences, indicating that the selective degradation method had no decrement in performance relative to customary methods. Follow‐up equivalence tests indicated that CODIS entry rates for the two methods could differ by more than ±5%. Selective degradation methods required less personnel time for testing and scientific review than standard testing.     

Challenge of Firearms Control in a Free Society

Chapter 10 of The Challenge of Crime in a Free Society, titled “Control of Firearms,” is a brief but strong statement in support of regulating gun transactions, possession, and carrying, with several specific recommendations, including the adoption of universal gun registration and permit‐to‐purchase requirements. The U.S. President's Commission on Law Enforcement and Administration of Justice, when writing the chapter, had no systematic research to draw on. Since its publication in 1967, the field of gun violence has become an active area of research, and much has been learned. But the nation has become far more polarized politically during the last 50 years, and gun policy has become a rigidly partisan issue. A new commission would have great difficulty reaching consensus, although there may be common ground on regulating guns vis‐à‐vis mental illness and domestic violence.     

Specimens for teaching forensic pathology, odontology, and anthropology. II. Teeth and bone

A set of specimens has been collected, preserved, and organized specifically for the teaching of forensic pathology, odontology, and anthropology. Plastination of soft tissue, whole organs, bones, and teeth has proven valuable in preserving delicate, friable, and calcined specimens. The dry, odorless, biologically inert specimens are durable and resistant to damage caused by handling. Subtle features of soft tissue pathology are well preserved. Patterned injuries change due to shrinkage, but remain easily recognizable. Plastinated whole jaws are still readily identifiable from antemortem records. Radiograph density is essentially unchanged. Putrid and charred specimens become quite manageable.     

Roadblocks and drunk driving: A time series analysis

Deterrence theory suggests that drunk driving can be reduced when the certainty of apprehension is improved. Sobriety checkpoints or roadblocks have been implemented in several jurisdictions to increase both the number of drunk drivers apprehended and the public’s perception of the risk of apprehension. The present study was conducted to obtain additional information on the effectiveness of such checkpoints as implemented in a medium sized urban community. A time series design consisting of 126 weeks of data was utilized to measure the impact of sobriety checkpoints on the number of alcohol related crashes. The research methods utilized, results obtained, and suggestions for further research are presented.     

Specimens for teaching forensic pathology, odontology, and anthropology. I. Soft tissue

A set of specimens has been collected, preserved, and organized specifically for the teaching of forensic pathology, odontology, and anthropology. Plastination of soft tissue, whole organs, bones, and teeth has proven valuable in preserving delicate, friable, and calcined specimens. The dry, odorless, biologically inert specimens are durable and resistant to damage caused by handling. Subtle features of soft tissue pathology are well preserved. Patterned injuries change due to shrinkage, but remain easily recognizable. Plastinated whole jaws are still readily identifiable from antemortem records. Radiographic density is essentially unchanged. Putrid and charred specimens become quite manageable.     

New techniques for the identification of microscopic samples of textile fibres by infrared spectroscopy

Infrared spectroscopy has proved to be a very useful method for the routine identification of man-made textile fibres. This paper describes the way in which this technique can fit into casework procedure using two different preparative methods. Spectra can be recorded from samples of 3 μg down to less than 1 μg in weight.