Using Dasymetric Mapping for Spatially Aggregated Crime Data

With availability of crime data to the public via sources such as the Uniform Crime Reports, and increasing geographic information system (GIS) capabilities for mapping crime, macro-level studies of crime have advanced knowledge of how crime is distributed over large areas. Choropleth mapping, commonly used in macro-level studies, visually displays data by assigning the number of crimes or crime rate to the corresponding spatial unit and using different shades or textures for each value or classified values creating a thematic map. However, crime incidents or crime rates are not dispersed evenly within spatial units, and choropleth mapping masks the underlying nuances of the distribution. Artificial boundaries, along with variations in the size of the unit of analysis, can further distort the true distribution of crime. Dasymetric mapping provides a methodology for refining the distribution of crime within a spatial unit. It does so by using additional data, such as land use and census data, to provide a realistic estimate of how crime may be distributed within the units of analysis. Dasymetric mapping is also useful in creating density maps to reveal clusters of crime normally masked with choropleth maps. This paper will show how dasymetric mapping can estimate the spatial distribution of aggregate level residential burglary within political boundaries in Massachusetts based on land use and housing data.     

The Dissociative Subtype of Posttraumatic Stress Disorder: Forensic Considerations and Recent Controversies

Psychological Injury and Law - This article provides an overview of the evidence concerning the dissociative subtype of posttraumatic stress disorder (PTSD) and its relevance in forensic contexts....     

The Direction of Deception: Neuro-Linguistic Programming as a Lie Detection Tool

There is a myth in popular psychology, often echoed in police literature, but as yet untested, that specific eye movements pertain to lying and truth telling. According to this line of thought, eye movements to the sender??s right indicate lying, as the sender??s eyes are drawn to the side of his/her brain where their fabrication is being created. We have put this hypothesis, derived from ??Neuro-Linguistic Programming?? to the test in two experiments. In Experiment 1, a total of 204 participants (all air passengers) were interviewed at an international airport about their forthcoming trip. All participants answered one question truthfully and one question deceptively. Some participants answered a third question truthfully, whereas others answered the same question deceptively. No conclusive evidence was found for a relationship between specific eye movements and deception. In Experiment 2, a total of 31 participants discussed their real occupation in one interview and a pretend occupation in another interview. Only three of the 31 participants revealed the eye movement pattern predicted by NLP. Reasons for the existence of the myth that liars display specific eye movements are discussed.     

Homicide by sharp force in two Scandinavian capitals

In the Oslo and Copenhagen capital areas, 141 homicides by sharp force were committed in the ten-year period 1985-1994. This method accounted for 33% of the homicides in this period. Thirty-five percent of the victims were female, and most of the victims were between 20 and 50 years of age. The majority of the male victims were killed by an acquaintance, the females by their spouse. Sixty-five percent of the male and 37% of the female victims had alcohol in their blood. The majority of the female victims had lesions in 3-4 anatomical regions, while the males most often had lesions in only one anatomical region. Seventy-nine percent of the females and 36% of the males had self-defence injuries in the upper extremities. In 21 cases (15%) the offender was a woman, 19 of their victims being male; the weapon in these cases was most often a kitchen knife. Seventy-eight percent of the females and 49% of the males were killed in their own home. The most common circumstance was family row when the victim was female, while a fight was the most common circumstance when the victim was male. Three offenders committed suicide after having committed homicide(s) (seven victims; three offenders).     

Homicide by firearms in two Scandinavian capitals

In the Oslo and Copenhagen areas, 83 homicides by firearms were registered in the 10-year period 1985 to 1994, accounting for 19.3% of all homicides in that period. The majority of the victims were between 20 and 50 years old, and 58% were male, 42% female. The yearly number of firearm homicides varied between 4 and 15, with neither an increase nor decrease throughout the period. Most of the victims had no detectable blood alcohol at autopsy. Female victims were typically shot in their own domicile with a shotgun by their spouse, mostly because of jealousy or in a family argument, whereas male victims were shot on different locations, predominantly with a handgun, for many different reasons. Most victims were shot in the head, and few had entrance wounds in more than one anatomic region.     

Interest groups in the criminal justice process

This article reviews recent research about interest groups in criminal justice policy making and considers the state of knowledge in this area. Portions of major studies by Downs, Berk et al., and Berk and Rossi are discussed. These studies came to varying conclusions about the nature and importance of interest group influence. Three points are suggested by the research described: (1) groups composed of criminal justice professionals (law enforcement personnel, corrections officials, attorneys) are more influential than those with social service or reform concerns, (2) particular social, cultural, and economic conditions in the various states affect interest group structure, power, and goals, (3) criminal justice legislation is generally enacted on a consensual basis without open conflicts in state legislatures and without major public involvement in the process. Some evidence that would tend to modify these conclusions is also presented. Avenues of future research concern are suggested and a framework for further analysis of interest groups in the politics of criminal justice is proposed.     

Clinical Assessment of Parents in Child Protection Cases: An Empirical Analysis

We investigated the content and legal relevance of clinical evaluations of parents conducted in child abuse and neglect cases. The sample consisted of 190 mental health evaluation reports, randomly selected from major providers, that had been completed on parents involved in a large, urban juvenile court system. We coded evaluations on 170 objective and qualitative characteristics in order to assess for criteria recommended in the forensic literature. We compared evaluations across groups categorized by type (e.g., psychological, psychiatric, bonding/parenting, substance abuse) and where the assessments were performed (outside or inside the court). We found numerous substantive failures to meet those criteria for forensic relevance. Evaluations of parents typically were completed in a single session, rarely included a home visit, used few if any sources of information other than the parent, often cited no previous written reports, rarely used behavioral methods, stated purposes in general rather than specific terms, emphasized weaknesses over strengths in reporting results, and often neglected to describe the parent's caregiving qualities or the child's relationship with the parent. Some relevant differences were evident across assessment groups, pointing to examples of more thorough, parenting-specific evaluation practices. We recommend ways to improve current practices in forensic parenting assessment.