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The purpose of this study was to contribute to the evidence base by analysing the characteristics and motives of homicides involving acts of dismemberment.

The current study explored offence, victim and offender characteristics and the motives for 71 homicides involving dismemberment using open source data. All cases included in this study were investigated in the UK between 1970 and 2016. A non-metric multi-dimensional scaling procedure smallest space analysis (SSA) was used to explore the characteristics and motives derived from a content analysis of homicide data sourced online.

A distinction between expressive and instrumental characteristics was observable with three thematic regions identified: instrumental – defensive, instrumental – predatory and expressive – affective. Support was found for previously identified motives for criminal dismemberment, with defensive being the most common motive identified in 63% (N = 45) of the cases.

The implications of the findings are discussed with suggestions made for future research. The findings have practical implications for assisting law enforcement and forensic and clinical practitioners in further understanding offenders who engage in homicidal dismemberment. This includes aiding homicide investigations, in terms of supporting investigators to draw upon offence, victim and offender characteristics and motives for homicides involving acts of dismemberment. Differentiation between cases of dismemberment and understanding of motives also has practical implications for the development of interventions and treatment pathways for homicide offenders who dismember victims.

Although offender profiling has been cited as an effective tool to interview suspects, empirical profiling methods have completely excluded interviewing suggestions when testing the validity of this technique. The purpose of this paper is to explore the utility of empirically derived profiles of offender- and victim-related sexual assault case characteristics (n=624) in the preparation of the interrogation strategies in sexual assault investigations.

Latent class analysis was used to extract profiles of offender- and victim-related sexual assault case characteristics in a sample of 624 incarcerated sex offenders. Moreover, relationships between offender and victim profiles were conducted using χ² analyses.

Findings show that specific offender-victim profiles are related to greater likelihood of confession during the interrogation. Possible interrogation strategies for each profile are suggested and implications for the practice of interviewing suspects are discussed.

The study is the first to examine both victim and offender profiles in order to assess the significant victim-offender profile combinations and their associated probabilities of resulting in confession.

The purpose of this study is to identify factors in sex offenders that act to facilitate or inhibit confession to police. Moreover, it aims to assess possible interactions and differences among factors related to confession specifically for child molesters and those who attack adult victims (rapists).

The authors use a combination of CHAID and conjunctive analysis to analyze interactions and factors significantly associated with confession to police in a sample of 624 sex offenders.

The study identifies several factors, as well as interactions among those factors, related to confession to the police. Moreover, rapists and child molesters present different factors related to confession, the former being more related to the criminal event as to the latter being more related to the offender characteristics.

The findings point to the conclusion that investigators need to pay careful attention to the type of victim when preparing the interrogation. Moreover, these crime event characteristics are readily observable factors that can improve the estimation of the likelihood of obtaining a confession. Finally, the several interactions identified confirm the complexity of the decision making leading to confession to police as well as the need to look at the factors in combination as opposed to individually.

This paper is the first attempt to apply a combination of innovative multivariate statistics (CHAID) and a qualitative technique (conjunctive analysis) to investigate factors leading to confession for two specific types of sex offenders.

The purpose of this paper is to identify offender typologies based on aspects of the offenders’ psychopathology and their associations with crime scene behaviours using data derived from the National Confidential Enquiry into Suicide and Safety in Mental Health concerning homicides in England and Wales committed by offenders in contact with mental health services in the year preceding the offence (n=759).

The authors used multiple correspondence analysis to investigate the interrelationships between the variables and hierarchical agglomerative clustering to identify offender typologies. Variables describing: the offenders’ mental health histories; the offenders’ mental state at the time of offence; characteristics useful for police investigations; and patterns of crime scene behaviours were included.

Results showed differences in the offenders’ histories in relation to their crime scene behaviours. Further, analyses revealed three homicide typologies: externalising, psychosis and depression.

These typologies may assist the police during homicide investigations by: furthering their understanding of the crime or likely suspect; offering insights into crime patterns; provide advice as to what an offender’s offence behaviour might signify about his/her mental health background. Findings suggest information concerning offender psychopathology may be useful for offender profiling purposes in cases of homicide offenders with schizophrenia, depression and comorbid diagnosis of personality disorder and alcohol/drug dependence.

Empirical studies with an emphasis on offender profiling have almost exclusively focussed on the inference of offender demographic characteristics. This study provides a first step in the exploration of offender psychopathology and its integration to the multivariate analysis of offence information for the purposes of investigative profiling of homicide by identifying the dominant patterns of mental illness within homicidal behaviour.

In order to address a notable gap in the research literature, the purpose of this paper is to examine age-related differences in juvenile homicide perpetration.

Data on 150 juvenile homicide offenders and their offences was derived from material available within the public domain, including media reports, case studies, court reports and previously published studies. Comparisons were then made between those aged 14 and under (n=63) and those aged 14-17 (n=87) across a range of offender, victim and offence-related variables.

There were no significant differences between the child (U-14) and adolescent (14-17) offender samples on any of the measured variables. The two groups had similar backgrounds, selected similar types of victims, had comparable breakdowns of different types of victim-offender relationship and had similar patterns of weapon use.

The fact that the two groups did not differ significantly has notable implications in practical and applied domains. By identifying risk factors for juvenile homicide perpetration, findings open up a range of possibilities for identification, investigation and intervention. In addition, findings might inform the development of offender treatment and rehabilitation programmes. Key limitations relate to the quality and quantity of data employed. Ways of remedying these weaknesses in future research are addressed.

This is the first study to directly compare child and adolescent perpetrators of homicide over a broad range of offender, victim and offence attributes.

The landscape of the Probation Service in England and Wales continues to be challenged by issues of priorities, workload, and lack of meaningful relationships between offenders and practitioners. In this climate of uncertainty and ‘transformation’, vulnerable offenders on probation become the ones mostly affected due to management plans and license conditions that do not respond to the variability of their needs. This chapter explores the older individuals on probation and uses the framework of Multi-Agency Public Protection Arrangements (MAPPA) to examine the extent to which it may accommodate the needs of this group of offenders in an otherwise risk-based context. This study draws ideas from previous research of the author and aims to develop the existing limited academic attention that older offenders supervised under specialised probation contexts have received. The structure of the chapter remains doctrinal in nature as a response to the need for a more comprehensive and inclusive perception of the risk of reoffending later in life and its implications for bespoke community reintegration strategies. This approach also allows for theorisation of MAPPA’s multi-agency structure and its prospects for the rehabilitation of older offenders. This study finds that as MAPPA only manages violent and sexual offenders, the ‘older MAPPA offender’ becomes a special category for probation that may exhibit a variety of needs and life circumstances. It thereby becomes even more important for these offenders that a constructive working relationship between them and the probation officer is in place. This supports the latter in appreciating what factors lead the individual to offending later in life, and what interventions may be most effective to address their risk of reoffending as well as their needs in the community.

The purpose is to theorize and empirically estimate the impact of the gendered nature of the offender-victim dyad and crime type on time to arrest.

Predictions regarding the impact of gendered offender-victim dyads and crime type on time to arrest are constructed by extending role congruity theory and tested using data from the FBI's National Incident-Based Reporting System across five crime types using dyadic-based event history methods.

The authors find strong empirical support that role expectations derived from the gender composition of offender-victim dyads and the masculinity of the crime type affect time to clearance.

This research is the first to theorize and empirically test the relative impact of role congruency and the relational nature of the offender-victim dyad in the adjudication process. Furthermore, the research shows that the construction of “normal crime” can be enhanced by applying a gendered and relational approach, based on social psychological theory, which is predictive of crime clearance.

Future research is required to validate the results for crimes where law enforcement has less discretion and are feminine typed.

The results imply that by accounting for the expectations generated by gender roles when applied to offender-victim dyads a casual mechanism is established that better organizes previously inconsistent results with respect to the impact of gender on time to clearance. Thus, the authors' utilization of role congruity theory of gender provides a more consistent explanation for inequalities in time to clearance that may be fruitful for evaluating other steps in the adjudication process.

Previous criminological research has examined the causes and correlates of violent juvenile offending, but failed to explore the developmental taxonomies of crime throughout history. Theoretically, developmental trajectories of offending (i.e. life‐course persistent and adolescence‐limited offenders) should be identifiable irrespective of time and place. This study aims to examine the pre‐offense characteristics of nineteenth‐century American parricide offenders.

Using archival records of two major newspapers (New York Times, Chicago Tribune), the study examines 220 offenders who committed attempted and completed parricides during the latter half of the nineteenth century (1852‐1999).

Results reveal that a small group of adult parricide offenders displayed antisocial tendencies at an early age that persisted into adulthood. These findings are consistent with the developmental literature, thus providing support for identification of pre‐offense characteristics of parricide offenders across historical periods.

The findings reported in this paper are of value to psychologists, historians, and criminologists, for they illuminate the similarities in predictors related to violent behaviors in a small subsection of adult offenders across two centuries.

The purpose of this paper is to discuss and demonstrate “best practices” for creating quantitative behavioural investigative advice (i.e. statements to assist police with psychological and behavioural aspects of investigations) where complex statistical modelling is not available.

Using a sample of 361 serial stranger sexual offenses and a cross-validation approach, the paper demonstrates prediction of offender characteristics using base rates and using Bayes’ Theorem. The paper predicts four dichotomous offender characteristic variables, first using simple base rates, then using Bayes’ Theorem with 16 categorical crime scene variable predictors.

Both methods consistently predict better than chance. By incorporating more information, analyses based on Bayes’ Theorem (74.6 per cent accurate) predict with 11.1 per cent more accuracy overall than analyses based on base rates (63.5 per cent accurate), and provide improved advising estimates in line with best practices.

The study demonstrates how useful predictions of offender characteristics can be acquired from crime information without large (i.e. >500 cases) data sets or “trained” statistical models. Advising statements are constructed for discussion, and results are discussed in terms of the pragmatic usefulness of the methods for police investigations.

Early classification systems of fire setting have suffered from several limitations, including the lack of empirical validation and the focus mainly on the offender motivation behind this type of crime. More recent research shows that looking at the crime scene behaviors may present a more fruitful approach for helping to solve fire setting offenses. The purpose of this study is to advance current scholarship by developing a new typology of fire setting based on the combination of offender motive and crime scene behaviors.

Latent class analyses were used with a sample of 134 fire setters who committed 275 arsons from the Korean National Police Agency to identify distinct fire setter motivations and crime scene contexts. Chi-square and crosstabulation analysis were then conducted to determine whether crime scene behaviors were associated with distinct offender motives and vice versa. Lastly, to improve the external validity of each of the latent classes, chi-square analyses were performed using variables related to the fire setters' criminal history, sociodemographic characteristics and arson classification.

Five motive subtypes were identified as well as five distinct crime scene contexts in which serial fire setting occurs. A significant association among these classes suggests that it is possible to infer fire setters’ motive from crime scene behavior and vice versa.

This comprehensive typology of fire setters has potential for profiling of unknown offenders as well as for suspect prioritization in police investigations.