Fatal positional asphyxia associated with rollover crashes

Motor vehicle rollover crashes result in complex occupant kinematics with the potential for severe injury. Five cases of fatal asphyxia in occupants suspended from their safety belt upside down after a rollover crash are presented. These fatalities accounted for 13.5% of all motor vehicle related asphyxia deaths in San Diego County over a 10-year period. This study supports previous research noting that incapacitation due to other injuries, alcohol, or obesity may be associated with fatal positional asphyxia due to inversion during rollovers. Safety belts are proven to prevent serious injury in motor vehicle crashes and should always be worn. However, redesign of the buckle could be considered to permit easier release by an occupant. We also suggest that pre-existing heart disease may contribute to the possibility of a fatal asphyxia outcome. Although this is a rare cause of motor vehicle related death, our results suggest that these are potentially preventable deaths.     

Differential indicators of defensive weapon ownership: a comparison by genderPublications received

While the majority of studies examining defensive weapon ownership identify variables related to ownership, these studies suffer from several methodological problems. Inclusion of sporting influences into a measure of defensive weapon ownership and errors in attribution of demographic variables weaken the results in many of these studies. In order to overcome these obstacles, only those respondents claiming to live alone were included in this analysis, and respondents were asked specifically if they had purchased a weapon for self-protection. Separate probit equations were estimated for males and females to assess differential indicators for men and women. Results indicate that although having a prior victimization was a significant positive indicator of self-help for men, women did not display similar relationships. Variables dealing with neighborhood characteristics, such as the percent of single parent households with children aged twelve through twenty and perceptions that crime is increasing in the neighborhood, were significant predictors of defensive weapon ownership for women.     

Legitimacy and context: implications for public sector reform in developing countries

This article examines the interplay between legitimacy and context as key determinants of public sector reform outcomes. Despite the importance of variables such as legitimacy of public institutions, levels of civic morality and socio‐economic realities, reform strategies often fail to take such contextual factors into account. The article examines, first, relevant literature – both conceptual and empirical, including data from the World Values Survey project. It is argued that developing countries have distinctive characteristics which require particular reform strategies. The data analysed shows that in Latin American countries, there is no clear correlation between confidence in public institutions and civic morality. Other empirical studies show that unemployment has a negative impact on the level of civic morality, while inequality engenders corruption. This suggests that poorer and socio‐economically stratified countries face greater reform challenges owing to the lack of legitimacy of public institutions. The article concludes that reforms should focus on areas of governance that impact on poverty. This will in turn help produce more stable outcomes. Copyright © 2008 John Wiley & Sons, Ltd.     

The systemic error in the vertical component of handgun bullet trajectory reconstructions

Establishing the path or trajectory of a fired bullet is an often recurring part of shooting incident reconstruction. The current study describes how gravitational pull causes a systemic error on the vertical component of a trajectory reconstruction. Bullet drop, drop angle, and vertical offset are explained and calculated for 10 different handgun/ammunition combinations over a range of distances up to 100 m. The presented results are intended to provide forensic firearm examiners with a reference frame for the magnitude of error introduced on handgun bullet trajectory reconstructions over distance. Threshold values of 20 and 30 m are proposed as conservative distances up to where bullet trajectories can be modeled as straight lines with subsonic/transonic handgun bullets and with supersonic handgun bullets respectively. Both the bullet drop and vertical offset will be below 5 cm at these distances for those categories. The drop angle will be below 0.3°.