Ashley Hewitt

Catch and release

Purpose – Factors influencing crime location choices are not only significant to rape investigations, but they are especially important for geographic profiling. The purpose of the current study is to use temporal, hunting behavior, and modus operandi factors to determine those variables that influence the victim encounter and release locations in serial sexual crime.Design/methodology/approach – Due to the possible correlated nature of serial rapes, the authors use generalized estimating equations (GEE) on a sample of 361 rapes committed by 72 serial sex offenders.Findings – Results indicate that temporal factors, offender hunting behavior, and modus operandi strategies are significant predictors of both the victim encounter and release sites, but the importance of these factors varies depending on whether the location is in a residential land use area, a private site, inside location, or a site that is familiar to the offender.Practical implications – Police can learn from the current findings and apply...

Sexual Murderers: Sex Offender, Murderer, or Both?

Sexual murderers perpetrate homicide and rape/sexual abuse, but it is unclear whether they should primarily be considered homicide offenders, sexual offenders, or both. Most studies have merged together different types of non-homicidal sex offenders (NHSOs), neglecting to consider the potential differences between the nonviolent and violent sex offenders. Here, we suggest it is important to isolate those violent sex offenders who inflict severe physical injuries that could potentially lead to a lethal outcome. Therefore, the aim of the current study is to compare different measures of the criminal career on three groups of sex offenders: NHSOs, violent NHSOs, and sexual homicide offenders (SHOs) using data from 616 incarcerated male sex offenders in a Federal penitentiary in Canada. Interestingly, the group of sex offenders with the worst criminal career profile was not the SHOs, but the violent NHSOs. Violent NHSOs had the greatest number of prior convictions and the most varied and versatile criminal career. Therefore, we suggest that based on their criminal career, SHOs should be considered more as murderers than sex offenders. However, to fully answer this question, future studies should include a group of non-sexual homicide offenders.

Offender mobility during the crime: investigating the variability of crime event contexts and associated outcomes in stranger sexual assaults

Using data from qualitative interviews and police reports, latent class analysis is used on a sample of 54 repeat stranger sexual offenders who committed 204 sexual assaults to identify discrete contexts present at the time of victim encounter that influence these offenders’ decision to use more than one location to commit their crimes. Five distinct classes are identified: residential outdoor common area, spontaneous/quiet outdoor site, residential home, active green space, and indoor/public gathering place. An investigation into the outcome(s) that most often result from the offender’s decision to move the victim during the sexual assault indicates that those who move the victim from an active green space overwhelmingly engage in sexual penetration, as well as forcing their victims to commit sexual acts on them. Crimes where the victim is moved from a residential home show evidence of the offender physically harming the victim as well as using more force than necessary to complete the assault. Implications for situational crime prevention are discussed.

The importance of gender in the spatial distribution of police interactions involving emotionally disturbed persons: an examination of call types

ABSTRACT The current study investigates gender differences in the spatial distribution of the British Columbia Mental Health Act (MHA), criminal and non-criminal police calls-for-service involving emotionally disturbed persons (EDP). Using a sample of 4341 police incidents over a three-year period, 13 pairwise spatial comparisons of similarity were completed across four dimensions: Mental Health Act events, criminal and non-criminal events, and gender. Results indicate that the locations in which EDP intersect with police services are spatially concentrated, and the spatial patterns differ depending on whether the events are calls that fall under the Mental Health Act, criminal, or non-criminal in nature. When considering the gender component, findings indicate that the locations of Mental Health Act calls are the most spatially distinct between males and females. Findings further emphasise that EDP are involved in many different types of contacts with the police, most of which are apprehensions under the British Columbia Mental Health Act, followed by criminal and non-criminal interactions. From a spatial perspective, the findings also highlight the need to differentiate between genders as well as event types to improve police resourcing and better guide situational crime prevention efforts.

Variations in Mental Health Act calls to police: an analysis of hourly and intra-week patterns

Purpose Investigating the day of week and hour of day temporal patterns of crime typically show that (late) nights and weekends are the prime time for criminal activity. Though instructive, mental-health-related calls for service are a significant component of police service to the community that have not been a part of this research. The purpose of this paper is to analyze calls for police service that relate to mental health, using intimate partner/domestic related calls for police service for context. Design/methodology/approach Approximately 20,000 mental health related and 20,000 intimate partner/domestic related calls for police service are analyzed. Intra-week and intra-day temporal patterns are analyzed using circular statistics. Findings Mental-health-related calls for police service have a distinct temporal pattern for both days of the week and hours of the day. Specifically, these calls for police service peak during the middle of the week and in the mid-afternoon. Originality/value This is the first analysis regarding the temporal patterns of police calls for service for mental health-related calls. The results have implications for police resourcing and scheduling, especially in the context of special teams for addressing mental health-related calls for police service.

An empirical examination of the victim-search methods utilized by serial stranger sexual offenders: a classification approach

Past research on the spatial mobility of serial offenders has generally found that these individuals make calculated decisions about the ways in which they come into contact with suitable victims. Within the geographic profiling literature, four victim-search methods have been theorized that describe how serial predatory offenders hunt for their victims: hunter, poacher, troller, and trapper. Using latent class analysis, the aim of this study is to test whether this theoretical typology can be empirically derived using data that were collected from both police files and semi-structured interviews with 72 serial sex offenders who committed 361 stranger sexual assaults. Empirical support is found for each of the aforementioned victim-search methods, in addition to two others: indiscriminate opportunist and walking prowler. Chi-square analyses are also conducted to test for associations between this typology and characteristics of the offense such as victim information, environmental factors, and the offender’s modus operandi strategies. Findings from these analyses suggest that the types of victims and environments targeted by the offender, as well as the behaviors that take place both before and during the offense, are dependent upon the offender’s victim-search strategy. Although the theoretical hunter, poacher, troller, and trapper were intended to describe the victim-search methods of serial violent predators more generally, the finding that these strategies exist along with two others in this sample of sexual offenders may indicate that search behavior is specific to certain crime types. Furthermore, these findings may be of assistance in the investigation of stranger sexual assaults by providing law-enforcement officials with possible clues as to the characteristics of the unknown suspect, the times and places likely targeted in any past or future events, and possibly even his base of operations.