The evaluation of the extent of transporting or "tracking" an identifiable ignitable liquid (gasoline) throughout fire scenes during the investigative process

Tests have determined that boots or shoes of individuals at a fire scene do not transport sufficient contaminants ("tracking") through the fire scene to produce a positive laboratory result for the presence of gasoline in a fire scene that was not present at the time of the fire. Questions about the validity of forensic laboratory results have been raised on the basis that low-level gasoline residues detected in the laboratory samples could have been the result of transporting the residue by footwear contaminated from the fire scene ("tracking"). The data collected in this study establish that "tracking" does not lead to false-positive laboratory results. Canines trained and experienced in the detection of trace ignitable liquid residues were also utilized in this study. The canine results confirmed that properly trained canines show a higher sensitivity than do standard ASTM laboratory techniques for fire debris analysis. In a few cases, canines responded to contamination, but laboratory testing (which is the definitive indicator) did not produce positive results.     

The enduring influence of electoral systems: investigating Green parties’ attention to local issues in parliament

Scholars argue that members of parliament (MPs) in first-past-the-post (FPTP) systems have stronger incentives to cater to their electoral district than those in proportional representation (PR) types. Yet, few studies have explored whether MPs in PR systems or MPs from small parties engage local issues in general. I build new theory and explore its support through a case study that compares Green party behaviour in an FPTP system (the UK) to a PR system (New Zealand). Results show that MPs focus on local issues in both systems, but the distribution of attention varies in ways consistent with differing electoral incentives.     

Foot Patrol in Violent Crime Hot Spots: The Longitudinal Impact of Deterrence and Posttreatment Effects of Displacement

This study revisited the Philadelphia Foot Patrol Experiment and explored the longitudinal deterrent effects of foot patrol in violent crime hot spots using Sherman's (1990) concepts of initial and residual deterrence decay as a theoretical framework. It also explored whether the displacement uncovered during the initial evaluation decayed after the experiment ended. Multilevel growth curve models revealed that beats staffed for 22 weeks had a decaying deterrent effect during the course of the experiment, whereas those staffed for 12 weeks did not. None of the beats had residual deterrence effects relative to the control areas. The displacement uncovered had decayed during the 3 months after the experiment, and it is theoretically plausible that previously displaced offenders returned to the original target areas causing inverse displacement. These results are discussed in the context of Durlauf and Nagin's (2011) recent proposal that prison sentences should be shortened, mandatory minimum statutes repealed, and the cost savings generated by these policy changes shifted into policing budgets to convey more effectively the certainty of detection. It is concluded that if Durlauf and Nagin's proposal is to succeed, then more holistic policing strategies would likely be necessary. Foot patrol as a specific policing tactic seems to fit nicely into a variety of policing paradigms, and suggestions for incorporating them to move beyond strictly enforcement‐based responses are presented.     

Subdural haemorrhage sustained in a baby-rocker? A biomechanical approach to causation

An unconscious 8 weeks old infant was admitted to hospital and found to have bilateral, subdural and retinal haemorrhages. He died the following day. The explanation for the subdural haemorrhage put forward by his carers was that the infant had been in a baby-rocker and that the carers had seen the rocker being rocked vigorously by their 14 months old daughter on two separate occasions. This paper describes the biomechanics of an infant model in the particular baby-rocker used and determines the maximum forces generated, comparing them with the 'forces' thought to be compatible with the causation of subdural haemorrhage.     

Course corrections and failed rationales: how comparative advantage and debt are used to legitimise austerity in Africa and Latin America

This article examines the role of ideological mechanisms in support of long-term economic liberalisation. Specifically we examine the ideological roles of comparative advantage and debt reduction as precursors to austerity policy imposition. Austerity policies, as episodic mechanisms designed to deepen neoliberalisation, are examined in the comparative historical context of Africa and Latin America.     

The spatial distribution of random gunfire: A block-level investigation of physical and social structural conditions

This paper examines the environmental and social structural correlates associated with random gunfire incidents. The study group consists of 273 face blocks and intersections in a selected portion of Dallas, Texas. The data show some locations routinely generate random gunfire, while others remain gunshot-free. The analysis suggests environmental factors are not sufficient to explain random gunfire. Implications for future inquiries are offered. The research for this paper was supported by Grant No. DOJ-OH-6-8971 from the National Institute of Justice. Findings and conclusions of the research reported here are those of the authors and do not necessarily reflect the official position or policies of the U.S. Department of Justice. The authors are indebted to the support from the Dallas Police Department with special appreciation to Sgt. Mark Stallo, Sgt. Bruce McDonald, and Southwest Crime Analyst Mike Edgar. Thanks also go to James Frank from the University of Cincinnati and Kasaundra Tomlin from the University of Central Florida.