Women who kill: a comparison of the psychosocial background of female and male perpetrators

Homicides committed by women with mental disorders: A descriptive study conducted in a French secure unit

Women remain a small minority of homicide offenders and appear to be understudied in the scientific literature. Gender-specific characteristics are however identified by existing studies. The aim of the study was to explore homicides committed by women with mental disorders, by analyzing their sociodemographic, clinical features, and criminological circumstances of the homicide. We conducted a retrospective and descriptive study among all female homicide offenders with mental disorders hospitalized in a French high-secure unit over a 20-year period (n = 30). We found that the female patients we studied were a diverse group in terms of their clinical profiles, backgrounds, and criminological characteristics. Confirming previous studies, we observed an over-representation of young women, unemployed, with a destabilized family situation and history of adverse childhood experiences. Prior self- and hetero-aggressive behavior were frequent. We found a history of suicidal behavior in 40% of cases. Their homicidal acts often occurred impulsively at home, in the evening or at night and were mainly directed toward family members (60%), especially their child(ren) (46.7%), then acquaintances (36.7%), and rarely a stranger. We found symptomatic and diagnostic heterogeneity: schizophrenia (40%), schizoaffective disorder (10%), delusional disorder (6.7%), mood disorders (26.7%), and borderline personality disorder (16.7%). Mood disorders were exclusively unipolar or bipolar depressions, often with psychotic features. The majority of patients had received psychiatric care prior to the act. We identified four subgroups, according to psychopathology and criminal motives: delusional (46.7%), melancholic (20%), homicide-suicide dynamic (16.7%), and impulsive outbursts (16.7%). We consider that further studies are necessary.

Lethal and severe violence: Characterizing Swedish female offenders with and without a severe mental disorder

Aim

In studies on lethal and severe violence, male offenders have historically been in focus while female offenders, in comparison, have often been excluded. In this study, we aimed to characterize female violent offenders and compared those with and without a severe mental disorder (SMD).

Method

All females charged with lethal or attempted lethal violence, who had undergone forensic psychiatric investigations (FPI) in Sweden between 2000 and 2014, constituting the two groups SMD (n = 84) and no SMD (n = 91), were included. Information from their FPI reports and court verdicts was collected regarding background and demographics, mental health, substance use, and crime characteristics.

Results

Overall, both groups were often unemployed, previously victimized within close relations, had psychiatric health issues, and more than half of them had previously attempted suicide. Specifically, the SMD group more often had psychotic disorders, had attempted homicide-suicide (at the time of the crime), and had children or friends/acquaintances as victims. The no-SMD group more often manifested patterns of anxiety, personality disorders, and substance use disorders compared to the SMD group. The no-SMD group also differed from the SMD group by more often having a previous criminal record, being charged with lethal index violence, having male adult intimate partners/ex-intimate partners as victims who had abused the offender, and both offender and victim had more often been under the influence of a substance.

Conclusion

Female offenders of lethal and severe violence had a high prevalence of previous violent victimization which should be considered in forensic assessment and treatment regardless of the offender's SMD status. However, more focus on substance use disorders and intimate partner relations appears relevant for females without an SMD. Contrary to that, early interventions regarding psychotic processes are probably a helpful preventive measure for females with an SMD. In sum, the heterogeneity of female offenders of lethal and severe violence emphasizes the necessity of developing nuanced interventions to meet their rehabilitative needs as well as the requirements of community protection.

Neurobiology of Female Homicide Perpetrators

Neurobiology of female homicide perpetrators is not well understood. Data from private interviews and examinations of females were re-analyzed comparing those who committed homicide (n = 9); other violent crimes, no known homicide (n = 51); nonviolent crimes, no known violent convictions (n = 49); and noncriminals (n = 12). Homicide perpetrators suffered the most childhood sexual abuse (CSA); most recent abuse; had the most neurological histories, mainly traumatic brain injuries (TBIs); most health care access for abuse-related injuries; lowest AM and PM salivary cortisol; and greatest proportion who committed crime under the influence of alcohol. Only CSA, years since last abuse, TBI, neurological histories, and health care access for abuse-related injuries were significant. Those who committed homicide under the influence of alcohol suffered the most recent abuse and had the lowest AM cortisol and flattest diurnal cortisol slope (DCS) compared with others; though the n precludes determining significance. Amount of time since last abuse, AM cortisol and DCS progressively decreased as crime severity increased; other variables progressively increased as crime severity increased. These preliminary findings suggest that low AM cortisol, flat DCS, greater CSA frequency and severity, recent abuse, TBIs, and health care access for abuse-related injuries could be risk factors for females committing homicide. Further study is needed due to the small n of homicide perpetrators. Abuse victims may be at greater risk for alcohol use and cortisol dysregulation associated with perpetrating violence, especially homicide. Frontal lobe damage from TBIs may decrease ability to control behaviors associated with emotions from the limbic system. Health care providers released these women when their abuse-related injuries were not life-threatening; yet, they were life-threatening for victims of their subsequent homicides. Females accessing health care for abuse-related injuries present a critical opportunity for violent crime prevention interventions.

Criminal Careers Among Female Perpetrators of Family and Nonfamily Homicide in Australia

Knowledge of women's pathways to serious offending, including homicide, is limited. This study contributes to a small but growing body of literature examining the criminal careers of serious female offenders by using interview data with females convicted of murder or manslaughter in Australia to examine various dimensions of their criminal careers, specifically, prevalence, frequency, age of onset, duration, and offending variety. In particular, in this study we compared criminal career dimensions across women who had killed a family member (e.g., intimate partner, children) and those whose victims were not part of the family unit (i.e., acquaintances or strangers). Our findings reveal differences between female homicide offenders who kill within and outside of the family unit. Although both groups had comparable overall lifetime prevalence of self-reported participation in criminal offending, findings indicate that participation among the family group was typically at low levels of frequency, of limited duration, and with relatively little variety in categories of offending. The family group also reported lower contact with the criminal justice system compared with the nonfamily group, and were less likely to have experienced some form of criminal/legal sanction in the 12 months prior to the homicide incident. This suggests that women who kill family members are more "conventional" than their nonfamily counterparts, in terms of having low and time-limited (i.e., short duration) lifetime participation in criminal offending.

Women and Men who Committed Murder: Male/Female Psychopathic Homicides

The present study was designed to compare gender differences in psychiatric diagnosis with the dimension of psychopathy in women and men who had attempted or committed homicide. The study samples consisted of 39 homicidal females and 48 homicidal males who were confined in one of Italy's REMS or prison facilities in two southern provinces of Italy (Puglia and Basilicata). Assessment instruments included the SCID-5, the PID-5 IRF, and the PCL-R. Each gender group was stratified according to the level of criminal responsibility for the homicidal offense (full, partial, absent), and after assessments, according to the degree of the psychopathic dimension. There were clear gender differences in homicidal individuals. Female offenders were less likely to have had a record of criminal charges/convictions or imprisonment, and their homicides were more often intrafamilial, victimizing especially of their children, whereas males targeted intimate partners and extrafamilial victims. In the entire group, there was an inverse relationship between the level of psychopathy and the personality disorder on one side, and the psychotic disturbance on the other. Factor 2 (lifestyle/antisocial dimension) of the PCL-R was higher among the homicidal males, whereas females tended to score higher on Factor 1 (the interpersonal/affective dimension). Finally, if the psychopathic dimension is a qualifier for antisocial personality disorder, as indicated in DSM-5, this appears to be less true for females who tend to have other personality disorders.

Psychopathy in Italian female murderers

Over the years, the number of homicides in Italy has progressively decreased, ultimately becoming one of the lowest rates in Europe (357 = 0.7 per 100,000 inhabitants in 2017, according to ISTAT). The number of homicides committed by women was about 9% of the total number of homicides during our study period. The percentage has increased in recent years because the total number of homicides has decreased without a proportionate decrease in the number of female homicides. Indeed, murder is an unusual type of crime for a woman and is often associated with a mental disorder, so when a woman committed a homicide, a psychiatric assessment was often performed. A forensic psychiatry expert was assigned to investigate the offender's psychopathology and mental state at the time of the offense. The root causes of the crime remained unexplained, however, due to the lack of a psychiatric precedent to justify this kind of assessment. The role of psychopathy in homicide has seldom been studied in female offenders, even though psychopathy has an important role in violent crimes. The investigators examined, clinically and historically, a sample of women who committed murder with different levels of criminal responsibility (female homicide offenders found not guilty by reason of insanity, having partial criminal responsibility, and convicted as criminally responsible and sentenced to prison) to identify the prevalence of the psychopathic dimension and its possible role in this sample. Prevalence and degree of psychopathic traits were examined in these female offenders using the Psychopathy Checklist-Revised. This study showed that females who had committed homicide were likely to suffer from mental illness; most of the homicidal acts were committed impulsively; and most female homicides occurred within the family, especially among women who were psychotic, but less so if they were psychopathic. Psychopathy tended to co-occur more with personality disorders than with psychotic psychopathology. Psychopathy was more evident among female homicide offenders who had been abused or traumatized. Psychopathic women who killed had high factor F1 scores and low antisocial component of factor F2.

When a Woman Kills Her Man: Gender and Victim Precipitation in Homicide

This research revisited the claim that victim precipitation (VP) is especially prevalent in situations where women kill their male intimate partners. Using administrative data from the Finnish Homicide Monitor ( N =1,494), we created a typology of homicide incidents to examine variation in VP across three factors: the gender of the offender, the gender of the victim, and the intimacy of the victim-offender relationship. The results from regression models demonstrated strong support for the assumption that killings by women of their male intimate partners are more likely to have been victim precipitated than other types of homicide. This homicide type stood out as having the strongest association with each measure of VP included in the analysis. We did not observe statistically significant differences in VP among other homicide types. For example, we did not observe gender differences in VP in homicides that did not involve intimate partners. This pattern of results contradicts prior evidence suggesting that VP is a general feature of female-perpetrated killings, independent of the gender of the victim and the intimacy of the victim-offender relationship. As such, the present study underscores the importance of replication in studies of interpersonal violence. Theoretically, the results support the gender-partner interaction hypothesis over gender differences hypothesis of VP.

The Importance of Being Acceptable - Psychiatric Staffs' Talk about Women Patients in Forensic Care

Currently, women comprise about ten percent of those sentenced to psychiatric forensic clinics in Sweden. Those who are sentenced to forensic care because of offending and violent behaviour have already taken a step away from the usually expected female behaviour. On the other hand, there are many women in forensic care who have not committed crimes, but who instead self-harm. Studies have identified a gender bias in diagnosing and care in psychiatric settings, but there are few studies conducted on women in forensic care. The present study therefore examined how the situation of women patients and female norms are expressed in the staff's talk about these women during verbal handovers and ward rounds at a forensic clinic in Sweden. The aim was to explore how psychiatric staff, in a context of verbal handovers and ward rounds, talk about women who have been committed to forensic psychiatric care, and what consequences this might have for the care of the patients. The content of speech was examined using audio recordings and a method of analysis that was inspired by thematic analysis. The analysis identified that the staff talked about the women in a way that indicates that they expected the women to follow the rules and take responsibility for their bodies in order to be regarded as acceptable patients.

Sex Difference in Homicide: Comparing Male and Female Violent Crimes in Korea

The comparison of the South Korean male and female homicide offenders' characteristics and crime scene behaviours is presented in this study. A total of 537 cases of homicide offenders prosecuted in Korea between 2006 and 2010 were analyzed in terms of offenders' characteristics, victim-offender interaction, places of crime, and crime scene actions. Significant differences between male and female offenders were revealed in prior criminal history, offenders' personal characteristics, choice of victim, crime scene behaviours during and after the homicide, and choice of weapon. The parallel with the gender differences in homicides found in Western countries is discussed as well as the possible explanations for the gender-related characteristics found in this study.

Characteristics of female mentally disordered offenders culpable under the new legislation in Japan: A gender comparison study

BACKGROUND

Although a substantial increase in the number of female offenders has drawn interest towards understanding their unique characteristics, few studies have investigated the characteristics of female mentally disordered offenders in Japan and none since the legislation enacted in 2005 in Japan, which provided for special services for them.

AIMS

The aim of this study is to identify those characteristics of people detained under this legislation, which distinguish the women from the men and may indicate special needs among the women.

METHODS

A retrospective records-based study of all patients admitted to one secure unit in the 8 years since its opening in July 2005 until a census date of 31 October 2013.

RESULTS

Thirty-six (15%) of the patients were women. Marriage, mood disorders, past suicide attempts and homicide were more common among the women than the men. Six of the female offender-patients had committed filicides, of which four were infanticides.

CONCLUSION

There appears to be a particularly vulnerable sub-group of women with severe mood disorders, a history of serious suicide attempts and young children at risk of harming those children. Our sample was small and from a single unit so, given the potential importance of improving understanding of who is at risk in such circumstances, extending our study nationally seems indicated.

How could she? Psychosocial analysis of ten homicide cases committed by women

OBJECTIVE

Ten percent of all homicide perpetrators are female and homicidal acts committed by women are mostly a result of interpersonal conflicts. We carried out a retrospective psychosocial analysis of ten homicide cases committed by women with an urban mid-European background. We evaluated characteristic determinants regarding 1) deed circumstances and motives, 2) the perpetrators, and 3) the victims. Results were compared with the literature on female and male homicides.

METHOD

Autopsy records of the Institute of Legal Medicine of the University Hospital of Düsseldorf, Germany, during the time period from 2006 to 2011 were searched for homicides committed by female perpetrators. Prosecution files were reviewed for further information.

RESULTS

The sample comprised N = 10 female homicide perpetrators and eleven victims. The mentioned determinants of the homicide were fairly consistent. All deeds occurred in the domestic context; they were mostly unplanned. All perpetrators were socially isolated and faced socially challenging situations. Most perpetrators were of low socioeconomic status. Furthermore, all victims were helpless and/or dependent on the perpetrator. The presence of a major psychiatric disorder was uncommon and, in contrast to male perpetrators, most women had no previous convictions.

DISCUSSION

The potential value of these core findings in our sample regarding prevention is discussed.

The 1% of the population accountable for 63% of all violent crime convictions

PURPOSE

Population-based studies on violent crime and background factors may provide an understanding of the relationships between susceptibility factors and crime. We aimed to determine the distribution of violent crime convictions in the Swedish population 1973-2004 and to identify criminal, academic, parental, and psychiatric risk factors for persistence in violent crime.

METHOD

The nationwide multi-generation register was used with many other linked nationwide registers to select participants. All individuals born in 1958-1980 (2,393,765 individuals) were included. Persistent violent offenders (those with a lifetime history of three or more violent crime convictions) were compared with individuals having one or two such convictions, and to matched non-offenders. Independent variables were gender, age of first conviction for a violent crime, nonviolent crime convictions, and diagnoses for major mental disorders, personality disorders, and substance use disorders.

RESULTS

A total of 93,642 individuals (3.9%) had at least one violent conviction. The distribution of convictions was highly skewed; 24,342 persistent violent offenders (1.0% of the total population) accounted for 63.2% of all convictions. Persistence in violence was associated with male sex (OR 2.5), personality disorder (OR 2.3), violent crime conviction before age 19 (OR 2.0), drug-related offenses (OR 1.9), nonviolent criminality (OR 1.9), substance use disorder (OR 1.9), and major mental disorder (OR 1.3).

CONCLUSIONS

The majority of violent crimes are perpetrated by a small number of persistent violent offenders, typically males, characterized by early onset of violent criminality, substance abuse, personality disorders, and nonviolent criminality.

Homicidal deaths in the Western suburbs of Paris: a 15-year-study

The aim of our study was to analyze the homicide pattern in the Western suburbs of Paris and its evolution between 1994 and 2008. All autopsy reports regarding homicides from the period January 1, 1994, to December 31, 2008, were retrospectively reviewed. Five hundred eleven homicide cases were selected of 4842 autopsy cases. The following data were recorded: assailants and victims characteristics, crime scene location, homicide motive, cause of death, and victim's postmortem toxicological results. Homicide rate steadily declined over the period at the exception of the number of homicide-suicide per year, which remained constant. Homicide victims remained unidentified after medicolegal investigations in 2% of the cases. Child and elder homicide cases represented, respectively, 10.7% and 8.2% of the cases. Offenders were male in 88% of the cases. Male and female assailants showed distinct homicide patterns: females were involved more frequently in familial quarrel and child abuse. They never killed a stranger and committed homicide exclusively in a private place with a predominance of sharp weapons. Males, in contrast, assaulted almost equally a stranger or an acquaintance, often in a public place with a predominance of firearm. Victim knew the assailant(s) in 57% of the cases. Homicides mostly took place at the residence of the assailant or the victim. Homicide motive was clearly determined in 71% of the cases. Argument was the most common motive in 44% of the cases. Sexual assault was rarely found (10 cases). Gunshot wounds were the most common cause of death (37%), followed by stab wounds (27%), blunt trauma (19%), and asphyxia (13%). A decrease of gunshot wounds as a cause of death was found over the studied period. Alcohol was the most common toxic detected in blood of the victim, in 48.5% of the cases when toxicological results were available. Blood alcohol concentration ranged from 1 to 500 mg/dL with a mean value of 150 mg/dL.

Gender differences in homicide offenders' criminal career, substance abuse and mental health care. A nationwide register-based study of Finnish homicide offenders 1995-2004

BACKGROUND

It is generally considered that women who kill are more likely to have a psychiatric disorder than their male counterparts, but as a relatively small group, women are much less often studied than men in this context.

AIM

To explore gender differences in the psychosocial history of homicide offenders.

METHOD

In this nationwide register-based study, data were extracted from the forensic psychiatric examination and crime reports of all 91 women prosecuted for homicide in Finland between 1995 and 2004 and from those of the next adjacent man convicted of a separate homicide (n = 91).

RESULTS

Both female and male homicide offenders had a troubled childhood, but more women had witnessed or experienced family violence; more women had failed to complete their primary education. Men, however, were more likely to have had an offending history. Although there were no differences between the men and women in the frequencies of psychiatric diagnoses or of substance abuse, the women had more often received prior mental health treatment. The women were also more likely to have had a history of suicidal behaviour.

CONCLUSIONS

Both female and male homicide offenders are a troubled group of people, with slightly different criminal careers. Many use mental health services and therefore prevention could be improved. The suggestion of a special sub-group of women characterised by early educational and behavioural difficulties needs replication, as it may have implications for service development.

Women convicted for violent offenses: adverse childhood experiences, low level of education and poor mental health

BACKGROUND

In past years, the female offender population has grown, leading to an increased interest in the characteristics of female offenders. The aim of this study was to assess the prevalence of female violent offending in a Swiss offender population and to compare possible socio-demographic and offense-related gender differences.

METHODS

Descriptive and bivariate logistic regression analyses were performed for a representative sample of N = 203 violent offenders convicted in Zurich, Switzerland.

RESULTS

7.9% (N = 16) of the sample were female. Significant gender differences were found: Female offenders were more likely to be married, less educated, to have suffered from adverse childhood experiences and to be in poor mental health. Female violent offending was less heterogeneous than male violent offending, in fact there were only three types of violent offenses females were convicted for in our sample: One third were convicted of murder, one third for arson and only one woman was convicted of a sex offense.

CONCLUSIONS

The results of our study point toward a gender-specific theory of female offending, as well as toward the importance of developing models for explaining female criminal behavior, which need to be implemented in treatment plans and intervention strategies regarding female offenders.