Explaining Dosage Diffusion During Hot Spot Patrols: An Application of Optimal Foraging Theory to Police Officer Behavior

Drawing from the concepts of optimal foraging theory, this paper presents and tests the assumptions of a foraging theory of police behavior during hot spots patrols. The theory explains why, over time, officers involved in hot spots policing interventions would leave the hot spots they are assigned to police and begin working within other locations. We test what factors influence the amounts of activity that officers undertake outside of their assigned hot spots and at nearby streets using data gathered as part of the Philadelphia Foot Patrol Experiment. Officers performed more activity outside of their beats as the experiment progressed. Several theoretically relevant variables predict the level of activity that officers perform outside their beats, including the size of the target area and the amounts of crime occurring within and outside of the target area. “Dosage diffusion” might be one reason why hot spot interventions have diminishing effects over time. From an optimal foraging theory perspective, hot spots requiring police officers to constrain their actions to pre-defined areas can be perceived as counter-intuitive by the officers, especially over extended periods of time. The results of this study support the suggestion that hot spots patrols should be short-term and randomly rotated across hot spots.     

Is it Important to Examine Crime Trends at a Local “Micro” Level?: A Longitudinal Analysis of Street to Street Variability in Crime Trajectories

Over the last 40 years, the question of how crime varies across places has gotten greater attention. At the same time, as data and computing power have increased, the definition of a ‘place’ has shifted farther down the geographic cone of resolution. This has led many researchers to consider places as small as single addresses, group of addresses, face blocks or street blocks. Both cross-sectional and longitudinal studies of the spatial distribution of crime have consistently found crime is strongly concentrated at a small group of ‘micro’ places. Recent longitudinal studies have also revealed crime concentration across micro places is relatively stable over time. A major question that has not been answered in prior research is the degree of block to block variability at this local ‘micro’ level for all crime. To answer this question, we examine both temporal and spatial variation in crime across street blocks in the city of Seattle Washington. This is accomplished by applying trajectory analysis to establish groups of places that follow similar crime trajectories over 16 years. Then, using quantitative spatial statistics, we establish whether streets having the same temporal trajectory are collocated spatially or whether there is street to street variation in the temporal patterns of crime. In a surprising number of cases we find that individual street segments have trajectories which are unrelated to their immediately adjacent streets. This finding of heterogeneity suggests it may be particularly important to examine crime trends at very local geographic levels. At a policy level, our research reinforces the importance of initiatives like ‘hot spots policing’ which address specific streets within relatively small areas.     

An Investigation of Mental Health and Personality in Swedish Police Trainees upon Entry to the Police Academy

This study aimed at personality and mental health status of Swedish police trainees considering gender differences; and at relationships between personality and mental health. 103 individuals were investigated by means of the SCL-90-R and the Temperament and Character Inventory (TCI) upon entry to the police academy. By contrast, the police trainees were mentally much healthier than individuals from the general population. They reported low Harm Avoidance and their character dimensions were more developed in terms of strength, responsibility and reliability. Harm Avoidance (positively) and Self-Directedness (negatively) were found to be associated with all facets of psychopathology. The good mental health and mature personality characteristics reported by trainees, particularly the females, suggest that they have the strength to master the stressful situations which they will face in their professional lives. In order to prevent possible psychological disturbances later in life, due to the high level of distress in their work, the development of trainees’ personality in terms of particular coping skills should be regarded as an integral part of their professional training at the police academy.     

Investigating Investigators: How Presentation Order Influences Participant–Investigators’ Interpretations of Eyewitness Identification and Alibi Evidence

Presentation order of ID and Alibi evidence was manipulated for undergraduate participants who conducted a simulated police investigation. Experiment 1 found a recency effect when an eyewitness rejected the investigator’s suspect. Experiment 2 also examined order effects, exploring how participant–investigators evaluated alibi information in addition to eyewitness ID information. When investigators saw the witness identify the suspect but also received a strong alibi for that suspect a recency effect occurred, such that whichever piece of information occurred at the end of the procedure had the strongest impact on investigators. Thus, type of evidence and evidence order both had a dramatic influence on participant–investigators’ decisions.     

Public perception of sex offender social policies and the impact on sex offenders

This study examines the public perception of sex offender policies and the perceived impact of sex offender policies on the sex offenders themselves. Specifically, this study explores how the community feels about the effectiveness of policies such as registration and community notification (Megan's Law), and housing restrictions in reducing sexual recidivism. Data are collected from 115 participants from a nationwide online community message board. Results suggest that although most individuals support Megan's Law, they do not feel the policy reduces recidivism. Furthermore, the majority of the participants also do not believe that housing restriction statutes are effective in reducing sexual recidivism. When questioned about the policy impact on sex offenders, the majority of respondents agree that as a consequence of Megan's Law, sex offenders are afraid for their safety; however, they do not believe that residence restrictions hinder sex offenders' employment opportunities. Findings from this study are discussed as they pertain to public policy and sex offender reintegration.     

Characterization of Undigested Particulate Material Following Microwave Digestion of Recycled Document Papers

Abstract:  Recycled document paper was microwave digested in a solution of HNO₃ and H₂O₂ prior to analysis by inductively coupled plasma mass spectrometry (ICP-MS) to determine the trace elemental concentrations within the paper. Undigested particulate material was observed and subsequently characterized as a mixture of kaolin (clay) and TiO₂ by Fourier transform infrared spectroscopy and X-ray diffraction spectroscopy. The effect of the particulate material on the elemental concentrations was then investigated. Paper samples were completely digested in hydrofluoric acid (HF) and element concentrations determined in the HF and HNO₃/H₂O digests were statistically compared using Student's t -test (95% confidence limit). Statistical differences in element concentrations between the two digests were observed for only four elements and there was no evidence of element adsorption by the particulate material. Hence, the HNO₃/H₂O₂ digestion proved sufficient to digest paper for ICP-MS analysis, eliminating the need to use the hazardous and corrosive HF matrix.     

Insurance Coverage for Climate Change Suits: The Battle Has Begun

When it comes to climate change litigation, the stakes are almost as high for insurance companies as they are for the defendants they insure. Insurers therefore have strong incentives to closely parse their policies and pursue every possible basis for denying coverage, while policyholders, of course, have the opposite incentives. Given the novelty of the underlying claims, complex coverage issues involved, and high stakes, it is expected that the resulting insurance coverage disputes will be lengthy and hard-fought.

Climate change litigation has been slowly heating up, but the expected coverage battles have not materialized, until now that is. In July 2008 Steadfast Insurance Company filed the first coverage suit challenging an insurer's obligations to provide coverage for climate change-related suits against its insured: Steadfast Insurance Co. v. The AES Corporation, No. 2008-858 (Va. Cir. Ct.).

This article provides background on the Steadfast dispute, as well as the underlying climate change suit. It then examines each of the three coverage issues raised in the Steadfast suit: (1) whether the claims arise out of an “occurrence,” (2) whether the claims are barred by the “loss in progress” doctrine, and (3) whether the pollution exclusion applies. The article predicts that the outcome of Steadfast will likely turn on the pollution exclusion defense, but that even with respect to that issue, the insurer faces an uphill battle.     

Intracoronary Thrombus Formation Following Carbon Monoxide Poisoning

Thromboembolic events in the context of carbon monoxide (CO) exposure have been well described in the literature. Six cases of clinically significant coronary thrombosis following CO exposure were previously reported. However, factors affecting the development of coronary thrombus in CO exposure are poorly understood, and the significance of this finding in a forensic context is not clear. This article discusses a case of coronary thrombosis found at autopsy following a death in which CO poisoning was suspected. A 67‐year‐old man was found dead in his garage with four vehicles with their ignition in the “on” position and their tanks empty. At autopsy, severe coronary atherosclerosis and an acute nonocclusive coronary thrombus were found. Given the dissimilarities among cases and the presence of CO exposure, it was suggested that the coronary artery thrombosis is likely due to the inherent prothrombotic mechanism of CO, the only common denominator in all the cases.     

Growing up Sexist: Challenges to Rawlsian Stability

John Rawls pinpoints stability as the driving force behind many of the changes to justice as fairness from A Theory of Justice to Political Liberalism. Current debates about Rawlsian stability have centered on the possibility of maintaining one’s allegiance to the principles of justice while largely ignoring how citizens acquire a sense of justice. However, evaluating the account of stability in political liberalism requires attention to the impact of reasonable pluralism on both of these issues. I will argue that the first question of Rawlsian stability – how a child acquires a sense of justice – remains unanswered in Political Liberalism. This fact has been overlooked by Rawls, his defenders, and his critics. The failure to attend to the ways reasonable pluralism undermines Rawls’s own story about a child’s moral development ultimately threatens Rawls’s account of stability in political liberalism – or so I will argue. Despite all of the changes Rawls makes to justice as fairness in order to resolve the stability challenge, Political Liberalism fails to deliver the robust stability Rawls seeks.     

The Direction of Violence Against Women Research and Evaluation

Although researchers have made numerous advances in the understanding of the nature, extent, and dynamics of violence against women (VAW), there is an ever-increasing need for data used in academic research and within policy decision-making to be collected via rigorous methodological designs to accurately measure the incidence and impact of VAW. What is now needed are research collaborations within an interdisciplinary research cluster that will expand understanding of the complex nature of VAW. The current article details an agenda or “call to action” to address deficiencies and advance VAW research, in addition to informing VAW intervention and prevention efforts.