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PubMed2000

Role of risk assessment in reducing homicides by people with mental illness.

BACKGROUND: Improved risk assessment has been stressed as the way to reduce homicides by people with mental illness. The feasibility of predicting rare events needs examining. AIMS: To examine the findings of public inquiries into homicides by people with mental illness to see if they support the claim that better risk assessment would have averted the tragedy. METHOD: Analysis was made of the findings of the public inquiries between 1988 and 1997 in relation to the predictability and preventability of the homicides. RESULTS: Of the homicides considered by the inquiry panels, 27.5% were judged to have been predictable, 65% preventable and 60% of the patients had a long-term history containing violence or substantial risk factors for violence. CONCLUSIONS: Improved risk assessment has only a limited role in reducing homicides. More deaths could be prevented by improved mental health care irrespective of the risk of violence. If services become biased towards those assessed as high risk, then ethical concerns arise about the care of both violent and non-violent patients.

Community Mental Health Services↗
PubMed2003

Effect of 11 September 2001 on suicide and homicide in England and Wales.

BACKGROUND: The tragic events of 11 September 2001 and televised scenes of the terrorists' homicidal and suicidal acts could have had an impact on the behaviour of some people, who harbour suicidal ideation or homicidal tendencies. AIMS: To assess the effect of 11 September 2001 on the rate of suicide and homicide in England and Wales. METHOD: Analysis of the number of suicides (ICD-9 codes: E950-E959), undetermined injury deaths (E980-E989) and homicides (E960-E969) in England and Wales in the 12 weeks before and after 11 September 2001 and during a similar period in the previous two years. RESULTS: The number of suicides reported in the month of September 2001 was significantly lower than other months in the same year and any September of the previous 22 years in England and Wales. A suicide reduction in men, regardless of age, occurred in the week starting Tuesday 11 September 2001. A reduction in female suicide occurred during the four weeks following the attack. There was no evidence of a similar effect on homicide. CONCLUSIONS: The tragic events of 11 September 2001 appear to have had a brief but significant inverse effect on suicide.The finding of this study supports Durkheim's theory that periods of external threat create group integration within society and lower the suicide rate through the impact on social cohesion.

England↗
PubMed2005

Homicide in the Canadian prairies: spousal killers, amnesia and self-harm.

This study identifies the incidence of claims of amnesia in homicide offenders and explores the associations with other psychopathology. It is a retrospective file review and analysis of 901 nonselective, adult men convicted of homicide. Claims of amnesia occurred in 31% (280) of the total homicide population and 46% of spousal killers compared to 28% of non-spousal killers. Claims in both groups were significantly associated with alcohol use and in the spousal group with actual or threats of self-harm at the time of the killing. Spousal killers were more likely to claim some degree of amnesia for the homicide and engage in or threaten self-harm after the killing. These and other features suggest that some spousal killers may have borderline personality traits/disorders. This study proposes a new classification for spousal homicides.

Adolescent↗
PubMed2003

Homicide-suicides in Fiji: offense patterns, situational factors, and sociocultural contexts.

Although there is growing literature on lethal violence in developing nations, homicide-suicides have rarely been studied. Addressing this issue, this paper analyzes all homicide-suicides that occurred in Fiji between 1982 and 1992. The study's results are consistent with prior research in Western developed nations, demonstrating that homicide-suicides constitute a minuscule proportion of all homicides, occur primarily between intimate relations, are precipitated by intrafamilial discord, and occur in the domestic setting. Contrary to prior research, however, perpetrators of homicide-suicide were equally divided between men and women and no firearms were utilized.

Adult↗
PubMed1996

[Mortality by homicide, the fatal consequences of violence. The case of Mexico, 1979-1992].

UNLABELLED: A study of homicide in the population of Mexico, was undertaken for the purpose of discovering the mortality panorama by this cause during 1979-1992. Homicide mortality trends were analyzed, as well as the main causes by age and sex. Rate by cause and sex were also analyzed using a Poisson Regression model. The variables were: age, sex, year, external cause of intentional injuries ICD 9th. E960-E969. RESULTS: The total number of deaths due to homicide was 198,485. Each day 35 persons die in Mexico as a result of homicide. Men were more affected than women with a RR of 10.1 and CI (95%) 14.9-16.0, adjusted for age. The main cause 56% was homicide by fire-arms and explosives. The high relative risk was for those aged from 35 to 39 with an RR of 15.4 CI 14.9-16.0. To the cause assault by other and unspecified means, the elderly population has a RR of 21.2 IC 19.7-22.9. Further research in the area and prevention should make use of a multidisciplinary approach in considering the multiple causes and solutions to this problem.

Adolescent↗
PubMed2001

[Violence and social inequalities: mortality rates due to homicides and life conditions in Salvador, Brazil].

INTRODUCTION: Some studies have been questioning the association between poverty and violence. This study's purpose is to assess the distribution of homicide indicators associated with living conditions in Salvador, Brazil. METHODS: A cluster study for the years 1991 to 1994 was carried out including the 75 data centers of the city of Salvador, BA, Brazil. Using death certificates for the study period, yearly mortality rates and mortality ratios were estimated. The 1991 census data of monthly wages and years of education for all family providers were used to define a four-category variable related to living conditions. Mortality rates due to homicide and the relative risk regarding the lowest living condition area were calculated for each social stratum. The 95% confidence intervals were calculated using the Confidence Interval Analysis software. RESULTS: The highest mortality rates due to homicide were seen in the poorest areas. The relative risk due to homicide for the lowest and the highest living condition areas was statistically significant at 5% level and ranged from 2.9 to 5.1. CONCLUSIONS: The data show a strong association between social inequalities and homicide in this urban area, emphasizing the importance of crime reduction programs.

Brazil↗
PubMed2005

[Spatial analysis of socioeconomic determinants of homicide in Brazil].

OBJECTIVE: To investigate the association between homicide rates and socio-economic variables taking into account the spatial site of the indicators. METHODS: An ecological study was conducted. The dependent variable was the rate of homicides among the male population aged 15 to 49 years, residing in the districts of the State of Pernambuco from 1995 to 1998. The independent variables were an index of the living conditions, per capita family income, Theil inequality index, Gini index, average income of the head of the family, poverty index, rate of illiteracy, and demographic density. The following techniques were used in the analysis: a spatial autocorrelation test determined by the Moran index, multiple linear regression, a spatial regression model (CAR) and a generalized additive model for the detection of spatial trend (LOESS). RESULTS: The illiteracy and the poverty index explained 24.6% of the total variability of the homicide rates and there was an inverse relationship. Moran's I statistics indicated spatial autocorrelation between municipalities. The multiple linear regression model best fitted for the purposes of this study was the Conditional Auto Regressive (CAR) model. The latter confirmed the association between the poverty index, illiteracy and homicide rates. CONCLUSIONS: The inverse association observed between socio-economic indicators and homicides may be expressing a process that propitiates improvement in living conditions and that is linked predominantly to conditions that generate violence, such as drug traffic.

Adolescent↗
PubMed2005

[Homicides in Medellín, Colombia, from 1990 to 2002: victims, motives and circumstances].

In Medellín, Colombia, homicide has been the first cause of morbidity and mortality for 20 years. Medellín has the highest homicide rates of all major cities in Latin America. This study describes the victims, motives, and circumstances in homicides in Medellín from 1990 to 2002. The period included 55,365 homicides, of which 1,394 were randomly studied. Of this sample, 93.6% (95%CI: 92.2%-94.8%) were males, 77.0% (95%CI: 75.0%-79.5%) less than 35 years of age, one-fourth had consumed alcohol, and nine out of ten were killed with firearms. The main motives were revenge and armed robbery. 37.0% (95%CI: 34.0%-41.0%) of the victims lived in the lowest socioeconomic stratum of the city. Characteristics of homicides in Medellín have remained unchanged since the 1980s, when the most violent period in the city's history began. The most heavily affected groups are young males who live and die in poor neighborhoods, and the murders are individual acts that leave no wounded behind.

Adolescent↗
PubMed2005

[Victims of color: homicides in Greater Metropolitan São Paulo, Brazil, 2000].

The objective of this paper was to analyze the homicide rate by racial/ethnic origin in Greater Metropolitan São Paulo, Brazil, after controlling for schooling, gender, and age. Based on available vital statistics for São Paulo and from the National Census, the homicide rates for blacks and non-blacks in Greater Metropolitan São Paulo in 2000 were calculated for 134 units (38 municipalities and 96 capital districts). In addition, two categories (reference and exposure) were created for each of the following death certificate socio-demographic data: race, schooling, gender, and age. The research used descriptive and logistic regression analyses. Although homicide rates were invariably higher for blacks than for non-blacks, the race variable was not statistically significant when schooling, gender, and age were controlled. The higher homicide rate for blacks in Greater Metropolitan São Paulo results from overrepresentation of blacks both among individuals with low schooling and in the young male population, the principal exposure categories for homicide.

Adolescent↗
PubMed2002

What we know about social structure and homicide: a review of the theoretical and empirical literature.

This article reviews what we have learned about social structure and homicide during the last 30 years, paying close attention to empirical tests of subculture, strain (both absolute and relative deprivation), and social disorganization theories. First, this review reveals that researchers have difficulty operationalizing culture in terms of values and instead often rely on regional location or group membership as a proxy for subculture. Though the findings relating subculture to homicide are inconsistent, however, culture should not be ignored. Second, the positive relationship between poverty and the spatial distribution of homicide rates is the most consistent finding in this literature, while empirical evidence of the effects of inequality on homicide is neither as strong nor as consistent. Finally, social disorganization is more consistent in explaining the variation of homicide rates than the subcultural and relative deprivation models, with elements of disorganization such as city size, family disruption, and heterogeneity all showing relatively consistent effects.

Culture↗
PubMed1996

Homicide risk among immigrants in California, 1970 through 1992.

According to the death certificates of the 65,510. California residents who died of homicide from 1970 through 1992, foreign-born persons are overrepresented in the homicides of California residents. Analysis of homicide data for 15- to 34-year-olds (n = 38,774), who account for a majority of all homicide victims indicated that immigrant-to-nonimmigrant risk patterns differed by ethnicity and across time. During the 23-year study period, foreign-born Whites, Hispanics, and Asians and others were at significantly higher risk and foreign-born Blacks were at a statistically similar risk of homicide compared with their US-born counterparts (risk ratio = 2.12, 1.24, 1.72, and 0.60, respectively).

Adolescent↗
PubMed1999

Income inequality and homicide rates in Rio de Janeiro, Brazil.

OBJECTIVES: This study determined the effect of income inequality on homicide rates in the state of Rio de Janeiro, Brazil. METHODS: We conducted an ecological study at 2 geographical levels, municipalities in the state of Rio de Janeiro and administrative regions in the municipality of Rio de Janeiro. The association between homicide and income inequality was tested by multiple regression procedures, with adjustment for other socioeconomic indicators. RESULTS: For the municipalities of Rio de Janeiro State, no association between homicide and income concentration was found an outcome that can be explained by the municipalities' different degrees of urbanization. However, for the administrative regions in the city of Rio de Janeiro, the 2 income inequality indicators were strongly correlated with the outcome variable (P < .01). Higher homicide rates were found precisely in the sector of the city that has the greatest concentration of slum residents and the highest degree of income inequality. CONCLUSIONS: The findings suggest that social policies specifically aimed at low-income urban youth, particularly programs to reduce the harmful effects of relative deprivation, may have an important impact on the homicide rate.

Adolescent↗
PubMed1990

Rethinking homicide: violence, race, and the politics of gender.

Although homicide is the fourth leading cause of premature mortality in the United States and the leading cause of death for young blacks, the health professions have been largely oblivious to violence. Prevailing explanations contribute to this neglect by emphasizing biological or psychiatric factors that make homicide unpredictable and cultural and environmental factors such as the emergence of a new "underclass" that link violence to race. Focusing on instances where no other crime is involved, this article proposes that "primary" homicide be reconceptualized as a by-product of interpersonal violence, a broad category of social entrapment rooted in the politics of gender inequality and including wife abuse, child abuse, and assaults by friends and acquaintances. The data show that blacks are no more violent than whites, though they are arrested and die more often as the consequence of violence. In addition, a majority of homicides are between social partners or involve gender stereotypes, are preceded by a series of assaults that are known to service providers, and grow out of "intense social engagement" about issues of male control and independence. Professional failure to respond appropriately is a major reason why assaults become fatal, particularly among blacks. An international strategy that combines sanctions against interpersonal assault, gun control, and the empowerment of survivors might prevent half of all homicides.

Adolescent↗
PubMed2000

On the presentation and interpretation of international homicide data.

Whitney in 1995 argued that White groups around the world have relatively low homicide rates compared to Black groups. He used the presumed similarity of homicide rates of White groups to argue for the importance of genetic factors and the unimportance of sociocultural factors in explaining group differences. We show that for Europeans, Whitney added two categories from United Nations data: homicide and death from a variety of other causes. For the U.S. White group, Whitney presented only homicide rates, thus making it appear as if Europeans have homicide rates comparable to those in the USA, when European rates are in fact considerably lower. The importance of careful scholarship in this area is emphasized.

Black or African American↗
PubMedDate not supplied

[Victim-related aspects of homicide of elderly persons in the catchment area of the Bonn Forensic Medicine Institute].

The present study examines the circumstances of 19 homicides involving 10 males and 9 females 60 years of age or older, which were submitted to the Bonn Institute of Forensic Medicine for autopsy. The incidence of these homicides sharply decreased by age. The causes of death were blunt force injuries alone or in combination in 8 cases and strangulation in 5 cases, thus reflecting the importance of the direct physical assault. Defense wounds were found in only 6 cases. The deceased unexceptionally suffered from diseases of the cardiovascular or respiratory system. Robbery or family/partner conflicts accounted for the vast majority of motives. Both, the most common location for homicide being in the victim's own residence and the high proportion of neighbours, acquaintances and relatives among the assailants underline that violence in the close social context endanger the elderly more than conventional violent street crimes. In the victims of homicide the elderly were represented in a smaller proportion than their percentage in the population at large. Over the 8 years of the present study there was no increasing tendency in the homicide rate in the elderly population.

Aged↗
PubMed1999

Homicidal behavior in schizophrenia associated with a genetic polymorphism determining low catechol O-methyltransferase (COMT) activity.

Although aggressive, violent, and dangerous behavior in man has multifactorial causes, genetic factors are estimated by twin and adoption studies to substantially contribute to the development of such conduct. Recently, homozygosity of a low enzyme activity variant of the catechol O-methyltransferase (COMT) gene was reported to be associated with aggressive behavior in a group of schizophrenic patients. We observe a similar tendency in a group of 30 schizophrenic patients who were confined to a maximum-security psychiatric facility for homicide. Significant excess (46.7% versus 21.0%) homozygosity of the low activity COMTmet/met genotype was observed in 30 mostly male (28 of 30) homicidal schizophrenic patients compared with 415 control subjects (Pearson chi(2) = 10.53, P = 0.005, df = 2). No difference in COMT genotype was found between 62 nonviolent schizophrenic patients and the 415 control subjects (chi(2) = 0.963, P > 0.1, df = 2). A trend for excess (46.7% versus 25.8%) homozygosity of the low activity COMTmet/met genotype was also observed when the homicidal schizophrenic subjects were compared directly with the nonviolent schizophrenic patients (chi(2) = 4.03, P = 0.1, df = 2). Similarly, an excess of the low activity COMTmet allele was observed in homicidal versus nonviolent schizophrenic patients (chi(2) = 2.92, P = 0.087, df = 2). Similar results were obtained if only male subjects were examined. No significant difference was found between control (257 Ashkenazi and 152 non-Ashkenazi Jews) COMT genotypes in the two principal ethnic groups examined (chi(2) = 3.79, P > 0.1, df = 2). Finally, no association was observed between homicidal behavior in schizophrenic patients and the dopamine D4 exon III repeat length polymorphism (D4DR) and the serotonin transporter promoter-region polymorphism (5-HTTLPR). Am. J. Med. Genet. (Neuropsychiatr. Genet.) 88:628-633, 1999.

Adult↗
PubMed2002

Variation in homicide risk during infancy--United States, 1989-1998.

Homicide is the 15th leading cause of death during the first year of life (i.e., infancy) in the United States. In addition, the risk for homicide is greater in infancy than in any other year of childhood before age 17 years and is greatest during the first 4 months of life. To determine how the risk for homicide varied by week during infancy and by day during the first week of life, CDC analyzed death certificate data for 1989-1998. This report summarizes the results of this analysis, which indicated that risk for infant homicide is greatest on the day of birth. Efforts to prevent infant homicides should focus on early infancy.

Homicide↗
PubMed2002

Workplace homicides in Chicago. Risk factors from 1965 to 1990.

Using data from police records, this study examined risk factors related to 940 workplace homicides occurring in Chicago between 1965 and 1990. Black men were predominantly both victims (49%) and offenders (75%). The median age for victims was 42 years, but only 25 years for offenders. Women (40%) were more likely than men (6%) to be killed by intimates. Firearms were involved in 83% of all homicides, and robbery was the primary motive (62%). Workplace homicides occurred most frequently in taverns (22%). Alcohol use by tavern workers was involved in 48% of the homicides. Wide disparity in the number of workplace homicides occurred in Chicago's 77 community areas. Strategies to deter robbery and alcohol use, as well as to prevent domestic violence in the workplace, need to be implemented and evaluated. Occupational health nurses play a pivotal role in effective violence prevention.

Adolescent↗