Testing the utility of a geographical profiling approach in three rape series of a single offender: a case study

The purpose of the study was to test the potential utility of a geographical profiling approach for three separate series of rapes committed by a single offender. Two different mathematical distance-decay functions using either a normal distribution with a mean distance and standard deviation based on previous research or a truncated negative exponential function based on distances between crime sites in the series under investigation were applied to each of the series giving prioritised search areas the accuracy of which was then assessed. The prioritised area that had to be searched before the home base of the offender could be located varied from 7.60 km(2) or 2.15% of the total search area at its best to 15 1.10 km(2) or 42.66% at its worst for the normal distribution based on previous research and from 42.06 km(2) or 11.88% to no improvement when the truncated negative exponential function was used. The functions used showed less predictive ability when the offender was a commuter. Explanations for the variations in the findings as well as suggestions for improvements were outlined in the discussion.     

Exploring the crime of identity theft: Prevalence, clearance rates, and victim/offender characteristics

Although the crime of identity theft has garnered a great deal of media attention, relatively little empirical research existed on the prevalence of the crime, its clearance rate by arrest, or the demographic characteristics of the victims and the identifiable offenders. The purpose of this article is to expand the knowledge of this growing crime. Using data from a large municipal police department located in Florida as a database, the findings suggested that the number of reported incidents of identity theft appeared to be growing at a greater rate than other theft-related offenses and the clearance rate for identity theft appeared to be declining. The typical apprehended offender was African American, female, unemployed, working alone, and was unknown to the victims, who tended to be White and male.     

论强奸罪的立法完善

随着性主体和性行为方式的多样化,强迫性交犯罪呈现出种种新现象。现有关于强奸罪的规定已不适应形势的发展,如强奸罪主体较狭窄,应该把女性主体和丈夫主体予以明确规定。同时,犯罪对象应该包括男性,客体为他人不可侵犯的性权利。客观方面,性交方式应将口交、肛交等包括进去;欺骗性交也可构成强奸。此外,适度降低强奸罪基本罪的法定刑,适当增加其量刑单位,并对加重情节予以完善。     

Consistency in crime site selection: An investigation of crime sites used by serial sex offenders across crime series

PurposeKnowing sites used by serial sex offenders to commit their crimes is highly beneficial for criminal investigations. However, environmental choices of serial sex offenders remain unclear to this date. Considering the challenges these offenders pose to law enforcement, the study aims to identify sites serial sex offenders use to encounter and release their victims and investigate their stability across crime series.MethodsThe study uses latent class analysis (LCA) to identify victim encounter and release sites used by 72 serial sex offenders having committed 361 sex offenses. Additional LCA are performed to investigate the stability of these offense environments across offenders' crimes series.ResultsDistinct profiles of crime sites that are recurrent across crime series are found, suggesting that serial sex offenders present a limited diversity of victim encounter and victim release sites. Encounter sites representative of longer crime series are also identified. Specifically, the use of sites known to "attract" potential victims decreases over series and offenders become more risk-taking in regard of sites used to encounter their victims.ConclusionsThe study identifies patterns of site- selection for the victim encounter and release in cases of serial crimes. Implications for crime linkage and police investigations strategies are discussed.     

Toulmin's philosophy of argument and its relevance to offender profiling

This study sought to identify the extent to which claims about the probable characteristics of offenders in ‘offender profiles’ were based on substantive arguments. Because Toulmin's (1958) philosophy of argument has been demonstrated as a useful way of breaking down arguments into their constituent parts (Burleson, 1979) we examined the extent to which profiles contained grounds, warrants, backing and rebuttals to support or refute various claims about offenders. Twenty-one profiles, representing a range of ‘profiling styles’, were obtained from a variety of sources. All of these had been used in major criminal investigations either in the UK or internationally. Of the nearly 4,000 claims made, nearly 80% were unsubstantiated. That is, they contained no grounds, warrant, backing or rebuttal. Moreover, less than 31% of the claims were falsifiable. We argue that (a) this demonstrates the need for a careful, systematic evaluation of profiling advice (b) Toulmin's structure is one useful method for evaluating such material and for providing a possible framework for such advice.     

Criminal psychological profiling of serial arson crimes

The practice of criminal psychological profiling is frequently cited as being applicable to serial arson crimes. Despite this claim, there does not appear to be any empirical research that examines serial arson offence behaviors in the context of profiling. This study seeks to develop an empirical model of serial arsonist behaviors that can be systematically associated with probable offender characteristics. Analysis has produced a model of offence behaviors that identify four discrete behavior patterns, all of which share a constellation of common nondiscriminatory behaviors. The inherent behavioral themes of each of these patterns are explored with discussion of their broader implications for our understanding of serial arson and directions for future research.     

Stranger sexual homicide: an exploratory behavioural analysis of offender crime scene actions

ABSTRACT

This study explores the role and function of homicidal and sexual violence in cases of stranger sexual homicide. The aim was to determine whether the instrumental/expressive hypothesis of physical violence and the overt/covert hypothesis of sexual violence applies to this crime. The method involved an analysis of the crime scene actions of 81 British stranger sexual killers using multidimensional scaling. Results suggest the instrumental/expressive hypothesis of physical violence and the overt/covert hypothesis of sexual violence does apply to stranger sexual homicide but they manifest as instrumental/overt and expressive/covert superordinate themes comprising four sub-themes reflecting rape, impersonal sexual assault, overkill and control. Although these superordinate themes can explain some stranger sexual homicides, a key hypothesis of this study is that the four sub-themes can also combine into different superordinate themes, knowledge of which can aid our understanding of this serious and deviant form of interpersonal violence.     

A preliminary analysis of feminist views on the crime of rape

Although rape has been considered a serious social problem for centuries, the rise of the Feminist Movement in North America in the 1970’s has served to bring the problem into the public eye. Leading Feminists, among them Camille LeGrand and Susan Brownmiller, have proposed new hypotheses both on rape and the rapist which differ significantly from traditional theories on the crime. Some of the Feminists’ hypotheses, particularly those which presuppose very high levels of rape and assume massive underreporting of the crime by its victims, do not receive much support in empirical surveys. But one aspect of the Feminists’ perspective on rape—that rape is an act against both person and property—is substantiated by empirical analysis of UCR data. The data suggest that the crime of rape shares significant commonalities with the crimes of property, as well as crimes of violence, and rape statistics act to hold together these two, otherwise different, categories of crime.     

Crime scene actions and offender characteristics in arsons

Purpose. Crime scene actions displayed by offenders in arsons were analysed in relation to offender characteristics and self‐reported motives. Methods. Data were drawn from an official police database and consisted of a random sample of arsons occurring in Finland between 1990 and 2001 (N = 189). The structure of dichotomous variables derived through a content analysis of crime scene actions and offender characteristics was analysed using non‐metric multidimensional scaling (MDS) analyses. Results. The analyses revealed four separate crime scene action types, with thematic emphasis on either expressive or instrumental motivation and the target being either a person or object. The MDS solution for offender characteristics suggested four types of offenders: Self‐destructive, Serial, Criminal, and Adolescent. In order to analyse the associations between action and characteristics themes, each case was assigned to one of the action and characteristic themes or a hybrid based on the frequency of variables present from each theme. Several statistically significant associations between the action and characteristic themes were found. Self‐reported motives were also analysed in relation to the themes. Conclusions. The results support the thematic classification of arsonists presented in Canter and Fritzon (1998). The results are discussed with regard to earlier research and deducing offender characteristics based on crime scene actions.     

Psychological autopsy in the investigation of serial neonaticides

While the use of psychological autopsies has at least a 50-year history in the investigation of equivocal deaths and suicides, we report a case where, after the discovery of a woman who died of natural causes, a subsequent search of her home found three deceased newborn infants. The infants were born on three separate occasions; the most recent was delivered approximately 2 weeks before the death of the mother. Using her own diaries and interviews with family and friends along with the physical autopsy and scene investigation data, we built a psychological autopsy that addressed the mother's mental state over the period of time when the infants' deaths took place. While the use of the psychological autopsy was not employed to distinguish the manner of death of the mother, it did provide explanatory power over circumstances of the crime scene and the behavioral disturbance of the mother.     

Adolescent homicides in Finland: offence and offender characteristics

Approximately 9% of the homicides in Finland are committed by adolescents under 20 years of age. The purpose of this study was to investigate the offence and offender characteristics in homicidal adolescents. Forensic psychiatric evaluation statements of adolescent offenders accused of a homicide during 1990-2001 were reviewed retrospectively (n=57). In 38% of the cases, there were multiple offenders. In 58% of the cases, the victim was an acquaintance, in 25% a stranger, in 12% a family member and in 5% of the cases an (ex)intimate partner. Sixty-nine percent of the offenders were intoxicated and 21% under the influence of drugs at the time of the killing. The most frequent motives were an argument (25%) and a robbery (25%). Sixty-four percent of the offenders had developmental problems and 42% had a crime history. Approximately half were diagnosed as having a conduct or a personality disorder, but 32% of the offenders were considered not to suffer from a mental illness or substance abuse. For 63%, the level of intellectual functioning was average or above average. There were signs of more than one form of violence in 54% of the cases and 28% of the cases contained excessive violence. The use of multiple and excessive violence was significantly related to the offender age, multiple offenders, offender-victim relationship and substance abuse, but not related to having developmental problems, crime history or mental illness.     

Mapping matters: geoprofiling application in South African serial rape investigation

Crime, Law and Social Change - Generally, the application of geographic profiling (also known as geoprofiling) is under-researched and its scientific and theoretical foundations, as well as the...