从心理迹证观点建构系统化现场勘察模式

本文从犯罪现场为基础,并以环境犯罪学观点,自国外实证研究结果就个人层级(理性选择理论)、社会互动层级(犯罪型态理论)、社会层级(日常活动理论)三种不同层次探讨性侵害加害者的决策模式(decision-making model)、犯罪空间型态(spatial patterns)、作案手法(modus operandi)与...     

Sexual crime and place: The impact of the environmental context on sexual assault outcomes

Purpose

Using the rational choice perspective, the current study investigates the impact that the environment and offending behavior have on serial sexual crime event outcomes.

Methods

The effects of time and place factors, as well as offender modus operandi strategies, on sexual crime event outcomes are tested using Generalized Estimating Equations on a sample of 361 crime events committed by 72 serial sex offenders.

Results

Time and place do impact serial stranger sexual offenders’ modus operandi strategies, but the place characteristics of the crime have more of an effect on the offender’s behavior than do the temporal conditions during which the event occurs. Subsequent analyses indicate that temporal and place factors, as well as offender modus operandi strategies, predict whether the offender completes the rape, his reaction to victim resistance, and the level of physical force that he inflicts on the victim, but not whether the victim is forced to commit sexual acts on the offender.

Conclusions

Serial stranger sexual offenders are effective decision-makers who adapt their strategies to the physical environment in which they commit their crimes, but their degree of rationality can vary as some outcomes are more dependent on the context than the offender and his actions.     

Female Sex Offenders: A Controlled Comparison of Offender and Victim/Crime Characteristics

The current study was a chart review of 31 female sex offenders (FSO), 31 male sex offenders (MSO), 31 female violent offenders (FO), and 31 male violent offenders (MO) using a 2 (female or male) by 2 (sex or violent offender) design. This is the first known study to employ three control groups when researching female sex offenders. Multiple variables appeared related to gender and crime. However, some variables emerged as FSO specific. They reported the least alcohol abuse history and had fewer admissions of guilt to the crime than the two violent offender samples. More FSOs knew their victim and were biologically related to their victim than MSOs. Lastly, the FSO sample was the least discriminating as to their victim’s gender and had the highest overall rate of sexual victimization.     

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.     

Employing mixed methods to explore motivational patterns of repeat sex offenders

PurposeUnderstanding the motivation of sex offenders plays a key role in societal perception of victim culpability and offender responsibility. This study identified patterns of offender motivation, assessed motivation stability across offenses, and estimated the influence of offense/victim specific factors on motivation in comparison to offender factors.MethodsEmploying mixed-methods sequential explanatory research design, the study utilized confirmatory factor analysis (CFA) to identify motivational factors underlying 346 crime events. Second, motivation stability was assessed across offenses committed by 69 offenders. Finally, interview data were reviewed to assess whether offender types emerged corresponding to CFA results.ResultsA motivational typology was identified comprised of five offender groupings built upon two underlying constructs, one driven by sexual gratification and the other linked to anger/aggression. Minimal change in motivation was observed across offenses committed by the same offender against different victims. Offense/victim specific influence (22-23%) and offender related influence (77-78%) were similarly distributed with both sexual and anger-driven motivation.ConclusionsMotivation plays a key role in offending. Offense/victim specific factors have similar proportional influence on crime motivation in comparison to offender factors irrespective of the type of motivation. Contrary to popular public perception, victim blame is not warranted regardless of what motivates offenders.     

VULNERABLE VICTIMS,MONSTROUS OFFENDERS,AND UNMANAGEABLE RISK: EXPLAINING PUBLIC OPINION ON THE SOCIAL CONTROL OF SEX CRIME

With the possible exception of terrorists, sex offenders in the United States experience a greater degree of punishment and restriction than any other offender group, nonviolent or violent. Members of the public overwhelmingly support “get tough” sex crime policies and display an intense hostility toward persons labeled “sex criminals.” The theoretical literature has identified three models potentially explaining public opinion on the social control of sex crime: the victim‐oriented concerns model, the sex offender stereotypes model, and the risk‐management concerns model. However, empirical work that directly tests these models is absent. This article addresses that gap by analyzing national survey data that includes measures of the key concepts outlined in the different theoretical models and items gauging support for punitive sex crime laws as well as support for sex offender treatment. The findings provide partial support for all three models but suggest that extant theories can better explain support for punitive sex crime policies than views about sex offender treatment.     

Proportionality in Sentencing and the Restorative Justice Paradigm: ‘Just Deserts’ for Victims and Defendants Alike?

The doctrine of proportionality seeks to limit arbitrary and capricious punishment in order to ensure that offenders are punished according to their ‘just desert’. In Australian sentencing law, proportionality goes some way toward achieving this ‘balanced’ approach by requiring a court to consider various and often competing interests in formulating a sentence commensurate with offence seriousness and offender culpability. Modification of sentencing law by the introduction of victim impact statements or the requirement that sentencing courts take explicit account of the harm done to the victim and community has generated debate, however, as to the extent to which offenders may be now subject to unjustified, harsher punishments. This article proposes that in order to overcome the controversy of the modification of offender and victim rights in sentencing, sentencing courts adhere to a doctrine of proportionality that is explicitly sensitive to the needs of victims and offenders in a model of restorative justice that focuses on the consequences of crime as against the individual, rather than the state. The extent to which proportionality, as the current constitutive principle of Australian sentencing law, may be modified to better encourage a dialogue between victim and offender is discussed.     

Sex offenders’ perceptions of the effectiveness and fairness of humanity,dominance, and displaying an understanding of cognitive distortions in police interviews: A vignette study

Abstract

Forty-three convicted sex offenders read each of four different offence vignettes that involved a man forcing a female victim into sex and the offender's subsequent police interview. The experimental manipulation involved giving participants each of four different scenarios concerning how the police interviewed the offender. These were interviews characterized by humanity, dominance, displaying an understanding of sex offenders’ cognitive distortions, or a neutral, control interview. Participants were required to rate the interviews on a variety of dimensions, such as the offender's likelihood of confessing, and the fairness of the interview. Where participants were told the man had been interviewed with humanity and compassion, they rated the offender as more likely to confess and rated the interview as fairer than the other conditions. In contrast, participants rated the offender interviewed with a dominant approach as less likely to confess, and for this procedure to be less fair than the other conditions. Displaying an understanding of sex offenders’ cognitive distortions appeared to have had no influence on perceived likelihood of confessions but was perceived to make the crime appear less serious.     

Sexual predators and prey: a comparative study of the hunting behavior of rapists and child molesters

Although there has been an increase in research on sex offenders' modus operandi, geographic decision making, and hunting behavior, most studies still tend to emphasize criminal motivation while overlooking the role of situational and environmental factors. Studies of mixed samples of rapists and child molesters typically neglect to conduct comparative analyses. Consequently, the full nature of their distinction is not clear. This is particularly problematic for the understanding of crossover or polymorphous sex offenders, who target victims from various age groups. Using a sample of 216 incarcerated sexual offenders, hunting behavior patterns were identified and tested to establish which hunting behavior patterns were associated with each type of offender. Relationships between modus operandi, geographic decision making, and hunting behavior were also examined. Three types of offender were identified: (a) manipulative; (b) opportunist; and (c) coercive. The manipulative offender is typically a child molester. The coercive offender is typically a rapist. The opportunist offender includes both rapists and child molesters. These findings emphasize the relevance of polymorphous, crossover, or versatile sex offenders and suggest new ways of conceptualizing sex offenders and their study.     

Contesting policy that undermines restorative justice for victims of crime☆

A policy provision in the Criminal Victim Assistance Program in British Columbia excludes the offender from participating in restorative justice approaches with the victim (and other affected parties) during counseling. A historical analysis of victim responses to crime shows that the victim experience to crime is socially constructed. In this regard, this policy act that excludes offenders from the victim healing process is consistent with a traditional approach to justice, which understands the offender to have committed a crime against the state, not the victim; however, separating the offender from the healing process is problematic within a restorative framework of justice where relationality is a central premise. Using a restorative lens, this policy act is contrary to an accompanying statute that has explicit provisions for counseling support for crime victims, as well as other statutes that provide for restorative responses to crime in Canada. The way we counsel and support victims from the harms created by crime cannot be separated from our view of justice.     

Discretion and the Sex Dyad: Exploring the Interactive Effects of Offender and Victim Sex on Reporting and Arrest of One-on-One Assaultive Crime

Gender has been hypothesized to affect how violent offenders are treated within the criminal justice system, but studies have tended to ignore the role of the victim in decision making. This study explores the interactive effects of offender and victim sex (i.e., the sex dyad) on reporting and arrest of one-on-one assaultive crime. Using data from the National Crime Victimization Survey and National Incident-Based Reporting System, findings show that male-on-female offenses are reported to police more often than other dyads, but female-on-male offenses result in more arrests. Meanwhile, female-on-female offenses result in fewer arrests, despite nonsignificant differences in reporting. Implications of findings for theory and future research on gender discretion are discussed.     

Differences in Psychosexual Development Among Child,Peer, and Mixed Juvenile Sex Offenders

Researchers have examined a number of typologies of juvenile sex offenders, including victim age. Using data from psychological evaluations and the Multiphasic Sex Inventory-II (MSI-II; [Psychological assessment of sex offenders, 2010 ]), this study compared child offenders (i.e., victims were more than 4 years younger), peer offenders (i.e., victims were 4 years younger or less), and mixed offenders (i.e., both child and peer victims) on variables including victim, offender, and offense characteristics, and psychosexual development. Peer offenders had more severe sexual offenses, prior status/nonviolent charges, and issues with sexual functioning. Mixed offenders began offending at a younger age and were indiscriminate in gender and relationship of the victim. Mixed offenders were also more likely than child and peer offenders to have prior sex offender treatment, meaning they had previously failed treatment. As juvenile sex offenders are a heterogeneous group, these research findings suggest that child offenders, peer offenders, and mixed offenders’ treatment needs differ from each other.     

OFFENDER–VICTIM INTERACTION AND CRIME EVENT OUTCOMES: MODUS OPERANDI AND VICTIM EFFECTS ON THE RISK OF INTRUSIVE SEXUAL OFFENSES AGAINST CHILDREN*

Criminological research has shown the relevance of examining offender–victim interaction and related factors to understand crime event outcomes. In sexual offenses against children, an obvious lack of knowledge exists regarding this issue. From a criminological perspective, we seek to improve our understanding of the offender–victim interaction in sexual offenses against children and, in particular, what factors might increase the risk of a more intrusive offense. We argue that modus operandi strategies play a central role in crime event outcomes and examine this hypothesis with data obtained from a semistructured interview conducted with offenders. As expected, modus operandi was found to have a strong effect on crime event outcomes, especially victim participation during sexual episodes. Victim effects also emerged from the analyses. Specifically, a strong interaction effect between age and gender of the victim was found for victim participation, which suggests that as the victim gets older, offenders are more likely to make their victim participate in sexual episodes when abusing a male victim but are less likely to do so when abusing a female victim.     

Target Selection Models with Preference Variation Between Offenders

Objectives

This study explores preference variation in location choice strategies of residential burglars. Applying a model of offender target selection that is grounded in assertions of the routine activity approach, rational choice perspective, crime pattern and social disorganization theories, it seeks to address the as yet untested assumption that crime location choice preferences are the same for all offenders.

Methods

Analyzing detected residential burglaries from Brisbane, Australia, we apply a random effects variant of the discrete spatial choice model to estimate preference variation between offenders across six location choice characteristics. Furthermore, in attempting to understand the causes of this variation we estimate how offenders’ spatial target preferences might be affected by where they live and by their age.

Results

Findings of this analysis demonstrate that while in the aggregate the characteristics of location choice are consistent with the findings from previous studies, considerable preference variation is found between offenders.

Conclusions

This research highlights that current understanding of choice outcomes is relatively poor and that existing applications of the discrete spatial choice approach may underestimate preference variation between offenders.

     

The Efficacy of Ideographic Models for Geographical Offender Profiling

Objectives

Current ‘geographical offender profiling’ methods that predict an offender’s base location from information about where he commits his crimes have been limited by being based on aggregate distributions across a number of offenders, restricting their responsiveness to variations between individuals as well as the possibility of axially distorted distributions. The efficacy of five ideographic models (derived only from individual crime series) was therefore tested.

Methods

A dataset of 63 burglary series from the UK was analysed using five different ideographic models to make predictions of the likely location of an offenders home/base: (1) a Gaussian-based density analysis (kernel density estimation); (2) a regression-based analysis; (3) an application of the ‘Circle Hypothesis’; (4) a mixed Gaussian method; and (5) a Minimum Spanning Tree (MST) analysis. These tests were carried out by incorporating the models into a new version of the widely utilised Dragnet geographical profiling system DragNetP. The efficacy of the models was determined using both distance and area measures.

Results

Results were compared between the different models and with previously reported findings employing nomothetic algorithms, Bayesian approaches and human judges. Overall the ideographic models performed better than alternate strategies and human judges. Each model was optimal for some crime series, no one model producing the best results for all series.

Conclusions

Although restricted to one limited sample the current study does show that these offenders vary considerably in the spatial distribution of offence location choice. This points to important differences between offenders in the morphology of their crime location choice. Mathematical models therefore need to take this into account. Such models, which do not draw on any aggregate distributions, will improve geographically based investigative decision support systems.     

A False Sense of Security: Moral Panic Driven Sex Offender Legislation

Data collected from correctional files of sex offenders managed by the California Department of Corrections and Rehabilitation were analyzed to explore the degree to which sex offender behavior meets the assumptions of the legislation intended to regulate their behavior. The study asked where offenders commit their sex crimes and the likelihood of choosing a known vs. a stranger victim. The concept of moral panic is used as a framework to discuss possible motivations for current sex offender legislation.     

A REAPPRAISAL OF THE OVERLAP OF VIOLENT OFFENDERS AND VICTIMS*

Because research shows a close association between offending and victimization, recent work has argued that theories that account for crime should explain victimization as well. The current study uses a new approach to examine the extent of the overlap between offenders who commit violent crime and victims of violence to determine whether it is worthwhile to pursue separate theories to account for these phenomena. Specifically, we take the statistical approach that Osgood and Schreck (2007) developed for analyzing specialization in violent versus property offending and apply it to analyzing tendencies to gravitate toward violent offending versus victimization. In doing so, we treat the differentiation into victim and offender roles as an individual‐level latent variable while controlling for confounding between the likelihood that individuals will take either role in violent acts and their overall numbers of encounters with violence (as either offender or victim). Our purpose is to examine 1) whether significant differentiation can be observed between the tendency to be an offender versus the tendency to be a victim, 2) whether any such differential tendency is stable over time, and 3) if it is possible to predict whether individuals will tend toward violent offending versus victimization. Using two waves of data from the National Longitudinal Study of Adolescent Health to explore these objectives, we find significant and stable levels of differentiation between offenders and victims. Moreover, this differentiation is predictable with explanatory variables.     

Developing Outcome Measures for Criminal Justice Information Sharing: A Study of a Multi-Jurisdictional Officer Notification System for Policing Sex Offenders in Southern California

Information-sharing efforts are broadly assumed by criminal justice and security practitioners to be effective, yet their impact on policing performance has not been thoroughly studied. This paper develops measures for an information-sharing system in a population of sex offenders in Southern California. We compared interagency involvement and policing outcomes for registered sex offenders with (n = 3,919) and without (n = 581) records pertaining to their sex offender status in the Officer Notification System (ONS) of ARJIS. To account for differences in criminal activity, offenders were matched on each of four focal incidents (citations, field interviews, crime cases, and arrests) and compared on outcomes that followed the focal incident. Compared to controls, sex offenders with ONS records were 75 % more likely to be involved with multiple agencies, 92 % more likely to have a citation following a crime case, 34 % more likely to have multiple crime cases (i.e., a crime case following an initial crime case), 44 % more likely to have a field interview following a citation, over 2 times more likely to have a field interview following a crime case, and 20-30 % more likely to have an arrest after a crime case, citation, or field interview. Novel measures of information sharing revealed links between the sharing of information about sex offender registrant status and the frequency and timing of police incidents and inter-agency involvement.