The pathological features and circumstances of death of lethal crush/traumatic asphyxia in adults--a 25-year study

A 25-year retrospective study of cases of crush/traumatic asphyxia autopsied at Forensic Science SA, Adelaide, Australia from 1980 to 2004 was undertaken. A total of 79 cases of crush asphyxia was found consisting of 63 males (80%) and 16 females (20%). The age range of the males was 19-86 years (mean=41.8 years) and of the females was 19-75 years (mean=38.6 years). In 18 cases the exact circumstances of death were unclear, leaving 61 cases in which details of the fatal episode were available. Major categories included vehicle crashes (N=37), industrial accidents (N=9), farm accidents (N=6) and entrapment beneath vehicles (N=5). Forty of the 79 victims (51%) had only very minor bruises and abrasions; 28 (35%) had evidence of chest compression with rib and sternal fractures and large areas of soft tissue bruising of the chest; 7 cases (9%) had other significant injuries or findings that had contributed to death. All of these victims had signs of crush asphyxia in the form of intense purple congestion and swelling of the face and neck, and/or petechial hemorrhages of the skin of the face and/or conjunctivae. The pattern of pathological findings of crush asphyxia was not influenced by the presence or absence of concomitant serious or lethal injuries. In 4 cases (5%) where the circumstances of the lethal episode were those of crush asphyxia there were no characteristic pathological findings. This study has shown that a high percentage of crush asphyxias may be caused by vehicle accidents. It has also demonstrated that on occasion fatal crush asphyxia may have to be a diagnosis of exclusion, made only when there are characteristic death scene findings, and no evidence of lethal natural diseases or injuries at autopsy, with negative toxicological screening.     

The influence of levels of information on the use of prospective evaluations

Recent work on voting behavior suggests that both retrospective and prospective evaluations are important components of vote choice. To test the generalizability of the prospective model, (1) the same model of voting behavior is applied to groups of differing cognitive abilities, (2) a comparison of the extent to which each group extrapolates from the past to the future is made, and (3) the frequency with which people of each group respond don't know is examined. The evidence presented supports the hypothesis that the prospective model is generalizable across segments of the population. Alternatively, since there are relatively few differences across categories, one might view this paper as a collection of negative findings.     

Strengths,Limitations, and Recommendations for Instrumental Color Measurement in Forensic Soil Characterization

Color determination of soil evidence is often done by visual comparison to soil color charts. A handheld spectrophotometer was tested with representative materials for its suitability for forensic soil characterization. Instrumental colorimetry provides accurate colorimetry with ~10-fold better precision than a soil color chart. The minimum sample size for accurate color determination was between 0.02 and 0.04 mg of fine soil for the specific instrument tested. Reporting colors in the L*a*b* space permits quantification of ΔE₀₀, a measure of perceptible color difference, could enable objective quantification of small color differences and thresholds for forensic soil comparisons. A ΔE₀₀ greater than ~ 3.5 to 6 likely indicates disparate soil sources in a forensic comparison, in the absence of confounding factors like sample alteration. Despite the superior precision of instrumental colorimetry, this approach is inappropriate for samples which are mottled at an inseparable scale, attached to a substrate, or too small for instrumental measurement.     

Sex offender notification and fear of victimization

Research on sex offender notification statutes was limited, and what did exist suggested notification resulted in increasing fear of victimization (Phillips, D. M. (1998). Zevitz, R. G. & Farkas, M. A. (2000c). Nonetheless, existing research failed to provide a direct measure of fear of victimization, or a comparison group to determine whether community members receiving notification were more fearful of victimization than community members, residing in the same neighborhood, who had not received notification. Additionally, existing research did not differentiate between fear of victimization for self (personal fear) and fear of victimization for others (altruistic fear). Warr (Warr, M. (2000) argued that the “strongest indictment” of the fear-crime literature was the failure to consider altruistic fear. By comparing emotional responses to specific types of victimization between groups of notified and not-notified community members, at the multivariate level, notification was significantly related to personal fear, but not altruistic fear. At the bivariate level, however, notification was related to one type of altruistic fear—sexual victimization.