Cross-national comparison of homicide: Age/sex-adjusted rates using the 1980 U.S. homicide experience as a standard

Cross-sectional studies of crime have typically relied on crude crime rates when making comparisons between countries. Crude rates control for population size but implicitly assume that all members of the population are equally at risk. Empirical studies have shown that, cross-nationally, risk varies by age and sex. Standardization of crime rates removes the confounding effects of variable age and sex population distributions. Since age/sex-specific crime rates are generally unavailable for many countries, the method of indirect standardization is the most desirable technique. Age/sex-adjusted homicide rates for 76 countries are presented, and two comparative measures are suggested. It is shown that while the United States has a higher homicide rate than all but 15 countries; in most cases, the magnitude of the difference, not controlling for age/sex differences, is overestimated. Crude rates underestimate differences between the United States and countries with higher rates of homicide.     

HOMICIDE AGAINST THE ELDERLY: A RESEARCH NOTE*

By virtue of the type of data generally used (victim surveys), previous research on the victimization of the elderly is limited in two respects. Not only is the crime of homicide outside the domain of victimization data, but sample surveys uncover too few incidents of victimization of the elderly to permit in-depth analyses. Using the supplementary homicide reports from 1976–1985, we compared patterns and rates of homicide among the elderly and younger populations. Our results suggest that the elderly are in fact the least at risk for homicide generally, as has been reported for other crimes. When examining specific subtypes of homicide, however, the elderly are actually at greater risk than their younger counterparts for homicide committed during a robbery.     

Homicide in Alabama: an analysis of urban, suburban and rural murders in the Deep South

Eleven hundred forty-four (1144) homicides occurring in Alabama, U.S.A. during a 2-year period are presented and analyzed according to the demographic parameters of the victims, location in urban, suburban, or rural community, type of homicide based on a medical examiner's classification, presence of drugs, weapon employed and other factors. Urban dwellers, Blacks and males are found to be at high risk. Alcohol is much more prevalent than other drugs in homicide victims. Although the handgun is the weapon most commonly used throughout the state, in the rural regions the longgun is used almost as often. The difficulty of making valid comparisons with other homicide studies is discussed and the establishment of a uniform classification of homicides urged.     

Risk of homicidal behaviour among persons convicted of homicide

We studied the risk of homicidal behaviour among persons convicted of homicide using an epidemiological method. The results showed that male homicide offenders are at least 10 times more likely to commit a homicide when compared with general male population. This odds ratio was about 150-fold among offenders who had committed at least four previous aggravated violent crimes as well as homicide.     

Youth homicide: a review of the literature and a blueprint for action

This article first synthesizes the literature on clinical and empirical findings related to youth homicide. Thereafter, it reviews the literature with respect to the treatment of juvenile homicide offenders. Although a large body of literature exists, many questions regarding etiology, associated risk factors, intervention strategies, and long-term outcomes remain unanswered. The article concludes with recommendations to guide future research efforts with the aim of increasing understanding of etiological factors associated with juvenile homicide and designing effective intervention strategies. Greater advances in knowledge will follow with the implementation of enhanced methodological designs that examine juvenile homicide across four distinct time frames: the years preceding the homicide, the time period immediately following the homicide, the incarcerative or treatment period, and the post-release period.     

Neuropsychological and Criminological Features of Female Homicide Offenders

Few studies have examined life history and cognitive characteristics unique to female homicide offenders. Understanding these characteristics could aid in risk assessment for extreme violence in this group of offenders. The current study utilized t‐tests or chi‐square tests to compare 27 female and 81 male homicide offenders on psychiatric, neurologic, criminal, and cognitive characteristics. Additionally, we explored the role of abuse history in female offenders through Kruskal–Wallis or Fisher's exact tests. Results indicate that in comparison with male counterparts, females are more likely to have history of mood disorder, borderline personality disorder, and abuse. Cognitively, female homicide offenders exhibit circumscribed cognitive impairment in verbal abilities and perform similarly to male homicide offenders across most cognitive tasks. Within the female offender group, history of sexual abuse is associated with higher rates of impulsive homicide and poorer verbal abilities. These findings provide preliminary evidence for distinct factors associated with homicide in women.     

IS THERE A SEASON FOR HOMICIDE?

A "thermic law" postulating a relationship between violent crime and hot weather or southern climates is one of the oldest propositions in criminology. On the question of homicide and seasonality, modern research produces contradictory findings—some studies support a seasonal pattern of homicide but others reject such a pattern. A review of studies on the seasonality of homicide and an analysis of Uniform Crime Reports data and data on homicide in Baltimore from 1974 to 1984 are undertaken in order to resolve the issue. The contradictory results are not explained by differences in definitions nor by differences in data or methodology; nor are they explained on the bases of regional differences or an urban bias present in most studies. The nature of the question asked, however, is critical to the results obtained. The conclusion reached is that there is no season to homicide. The months of December, July, and August are significantly more likely to be among the months in which homicide is high for any given year, but the number of homicides during those months may not be significantly higher than in other months.     

Neighborhood structure differences between homicide victims and non-victims

While there were numerous studies documenting the neighborhood characteristics that led to increased risk of crime victimization, very little was done to compare the neighborhoods of homicide victims to non-victims. The current research used the case-control design to alleviate this gap in the research. A sample of homicide victims and non-victims collected from Prince George's County, Maryland, in 1993, was used to make these comparisons. Significant differences were noted in the macro-level measures of education, unemployment, household income, and percentage of female-headed households in the neighborhoods of victims and non-victims. Individual elements, such as age, race, gender, and arrest were also strongly associated with the risk of homicide victimization. Both macro and micro level variables needed to be included when studying factors that increased the risk of homicide victimization.     

Gender-specific risk factors for intimate partner homicide--a nationwide register-based study

The present study examined gender differences in intimate partner homicide (IPH) and offender characteristics with the focus on putative gender-specific risk factors in a nationwide consecutive sample of homicide offenders. Data on all offenders (N = 642; 91 females, 551 males) convicted of homicide and subjected to a forensic psychiatric examination in Finland were obtained for the years 1995 and 2004. IPH offenders, 39 female and 106 male, were compared for risk factors with female and male offenders whose victims were not spouses. The forensic psychiatric examination reports were retrospectively analyzed, and the Hare Psychopathy Checklist-Revised (PCL-R) was rated. Significant gender differences were found in four risk factors: employment, intoxication of victim, self-defense, and quarrel, mostly related to alcohol as a factor of the offense. The findings support the notion that female IPH is linked to defensive reactions resulting from prior abuse, and that IPH offenders resemble the general population more than offenders of other types of homicide.     

The effects of marital status and social isolation on adult male homicides in the United States: Evidence from the National Longitudinal Mortality Study

With data from the 1979–1985 Longitudinal Mortality Study, we examine the effects of marital status and social isolation on adult male homicide (ICD-9 Codes E960-E978). Cox proportional hazards models were fitted to a 1979–1981 population cohort of approximately 200,000 adult men and their mortality experiences were followed until 1984–1985. Multivariate hazards regression analysis showed that marital status and social isolation are associated with significantly higher risks of homicide victimization. Controlling for age and other socioeconomic covariates, single persons were 1.9 times, and divorced, separated or widowed persons were 1.7 times, more likely to die from homicide than married persons. Socially isolated persons were 1.6 times more likely to become homicide victims. Other adult males with increased risk of homicide victimization were African Americans and those who lived in the inner city.     

Aging and homicide rates

There are no published studies concerning the effect of mortality rate on the rate of homicide by habitually violent offenders. On the basis of nation-wide statistics in Finland, the frequency of homicide is 61% lower among 50-year old males than among 30-year old males. However, when the 4.9-fold mortality of habitually violent offenders is taken into account, the homicide rate is only 43% lower among 50-year old males than among 30-year old males. This is an important issue in forensic psychiatry and that requires further attention, as age is used a predictive factor when assessing the risk of violent behavior.     

National study comparing the characteristics of patients diagnosed with schizophrenia who committed homicide vs. those who died by suicide

Associations between serious mental disorder and violence are well-documented, but there is little epidemiological evidence linking these disorders and homicide risk. The reported study compares socio-demographic and clinical characteristics of people diagnosed with schizophrenia who committed homicide vs. those who died by suicide. The study is a national case series of male patients in England & Wales diagnosed with schizophrenia and convicted of homicide during 1997–2012 (n = 168), and a randomly selected comparison group of male patients with schizophrenia who died by suicide and who were matched to the homicide case series by age (n = 777). There are different patterns of behaviour in people with schizophrenia preceding homicide and suicide. Homicide perpetrators have frequently disengaged with services whilst patients who die by suicide are often in recent contact. This is important knowledge for clinical services as it indicates a different preventive emphasis despite the existence of other shared characteristics.     

Biology, childhood trauma, and murder: rethinking justice

This article reviews recent findings in the developmental neurophysiology of children subjected to psychological trauma. Studies link extreme neglect and abuse with long-term changes in the nervous and endocrine systems. A growing body of research literature indicates that individuals with severe trauma histories are at higher risk of behaving violently than those without such histories. This article links these two research areas by discussing how severe and protracted child abuse and/or neglect can lead to biological changes, putting these individuals at greater risk for committing homicide and other forms of violence than those without child maltreatment histories. The implications of these biological findings for forensic evaluations are discussed. Based on new understanding of the effects of child maltreatment, the authors invite law and mental health professionals to rethink their notions of justice and offender accountability, and they challenge policymakers to allocate funds for research into effective treatment and for service delivery.     

A 10-year epidemiologic review of homicide cases in children younger than 5 years in Fulton County, GA: 1996-2005

The primary purpose of this study was to present the epidemiologic review of homicide deaths certified by the Fulton County Medical Examiner's Office from January 1, 1996 through December 31, 2005 in children younger than 5 years. The secondary purpose of this study was to determine if the observed cases of homicide deaths among children younger than 5 years in Fulton County are significantly greater than expected when compared with those in the State of Georgia. For purposes of this study, only homicide deaths of Fulton County residents were included. The authors reviewed all homicide cases in children younger than 5 years: infancy (<1 year) and early childhood (1-4 years). χ values were calculated using Epi Info (version 3.4.1; Centers for Disease Control and Prevention, Atlanta, Ga) to determine differences in homicide among age group, race, and sex variables. In addition, a χ test at the α level of 0.05 was done to determine if the observed cases of homicide deaths among children younger than 5 years in Fulton County were significantly greater than expected when compared with those in the State of Georgia. There were 49 homicide cases in children younger than 5 years identified over this 10-year period. The yearly distribution of these 49 homicide deaths ranged from 1 death in 2003 to 9 deaths in 2004. Most of the patients were male (n=29, 59.2%) and black (n=44, 89.8%). Between infancy and early childhood cases, homicide victims were nearly equally divided between the 2 groups. However, χ values showed that decedents younger than 5 years are more likely to have died of homicide compared with decedents 5 years or older (odds ratio [OR], 1.74; 95% confidence interval [CI], 1.29-2.35). Black decedents younger than 5 years are more likely to have died of homicide compared with other races (OR, 3.21; 95% CI, 1.21-9.28). Male and female decedents are equally at risk to have died of homicide (OR, 1.14; 95% CI, 0.61-2.11). The authors also determined that the total homicide risk for children younger than 5 years in Fulton County during the years 1996 to 2005, at the α level of 0.05, is 1.8 relative to the state. Brain injury was the primary cause of death in most cases (n=23, 46.9%). Although this study was unable to collect information on the victim's suspect/offender characteristics, it was noted that only 37% of the cases (n=18) went to trial. Most homicide investigations were under the Atlanta police jurisdiction (n=28, 57.1%). Results from this study may assist local and state government officials in recognizing the epidemiologic characteristics of children at risk to help them allocate limited resources efficiently and implement preventive measures to at-risk populations effectively.     

Criminal recidivism in sexual homicide perpetrators

Forensic psychiatric reports on 166 sexual homicide perpetrators in Germany were retrospectively analyzed for criminal risk factors. Follow-up information about release and reconvictions from federal criminal records was available for 139 offenders; 90 (64.7%) had been released. The estimated recidivism rate (Kaplan-Meier analyses) for 20 years at risk was 23.1% for sexual and 18.3% for nonsexual violent reoffences. Three men (3.3%) were reconvicted for attempted or completed homicide. Only young age at the time of sexual homicide resulted in higher sexual recidivism, whereas increased nonsexual violent recidivism was related to previous sexual and nonsexual delinquency, psychopathic symptoms, and higher scores in risk assessment instruments. Increased recidivism with any violent reoffence was associated with age-related factors: young age at first sexual offence, at homicide, and at release and duration of detention. The impacts of the results for risk assessment, relapse prevention, and supervision are discussed.     

The social ecology of homicide: A modified lifestyle/routine activities perspective

Recent research on criminal victimization suggests that lifestyle may offer important insights into the unequal distribution of crime. The lifestyle approach is used here to explore variations in homicide rates for Dade County, Florida. The application of this approach to the analysis of cross-sectional variations in homicide rates requires (1) elaboration of the assumptions that connect the likelihood of victimization for individuals to variations in the rate of victimization by location as well as (2) justification of the selection of specific variables as indicators of variation in exposure to the risk of homicide. In sum, four individual characteristics and six residential characteristics are said to be implicated in the explanation of variations in homicide rates among census tracts. Census tract data derived from 1980 Bureau of Census files are used to explore these variations. Findings suggest that future researchers should consider the relative importance of individual attributes, especially marital status, in increasing the risk of homicide victimization.     

National case-control study of homicide offending and methamphetamine use

The purpose of this study is to examine the relationship between methamphetamine use and homicide. To carry out this study, data from the National Household Survey on Drug Abuse and Survey of Inmates in State and Federal Correctional Facilities were combined to create a case-control design. The main exposure measure is methamphetamine use and the main outcome measure is homicide. Results suggest that the odds of committing a homicide are nearly 9 times greater for an individual who uses methamphetamine. More importantly, the association between methamphetamine use and homicide persists even after adjusting for alternative drug use (i.e., alcohol, heroin, crack, cocaine, PCP, LSD), sex, race, income, age, marital status, previous arrests, military experience, and education level. Methamphetamine was the only drug use variable that was strongly correlated with homicide. These results support recent clinical studies that suggest methamphetamine use is different than other drug use in its effects on violence.     

Homicide–Suicide in China: an Exploratory Study of Characteristics and Types

This study explores 63 homicide–suicide cases that include two or more homicide victims, in the People’s Republic of China. This is the first study to examine homicide–suicide in the Chinese context, following calls to develop a research strategy outside of the USA and Europe. Data are derived from a content analysis of Chinese news sources from 2000 to 2014. Findings show homicide–suicide offenders are likely to be married males living in rural cities who kill their intimate partners and/or children inside a residence using knives. Intimate partner conflict and extramarital affairs are precipitating factors in almost half of the incidents. Patterns of homicide–suicide in China are comparable to those in high-income countries, except that firearms are not the primary means in China and there is no evidence of “mercy killing” among older persons, as described in western homicide–suicide studies. Findings are related to the social and economic structure of Chinese society. Clinical and policy implications include the need for greater transparency and a nationwide homicide and suicide tracking system in China, stricter domestic violence laws, postmortem studies of the brains of homicide–suicide offenders, and psychological autopsies on homicide–suicide perpetrators.