Examining Space–Time Interaction in City-Level Homicide Data: Crack Markets and the Diffusion of Guns Among Youth

This paper examines the linkage between crack market activity and gunhomicide suggested by Blumstein (1995), who argues that the arrival ofcrack stimulated an increased availability of guns among juveniles. Thisgreater availability of guns, the argument continues, is responsible for thesharp upswing in juvenile homicide experienced in the United States in themid-1980s. Using city-level data on crack arrests and gun-related juvenilehomicide, we fit a change-point version of the Bass (1969) model ofinnovation diffusion. We find that, in most large American cities, thediffusion process for crack cocaine experienced an onset of dramatic growththat was followed by a similar, slightly slower growth in gun homicidescommitted by juveniles. We further use cluster analysis to find that thespatial patterning of the two processes is similar, starting on the East andWest Coasts and working their way toward other regions of the nation. Gunuse in homicide among slightly older offenders (ages 18–24) alsoexperienced a change at roughly the same time as the juveniles, but the rateof diffusion was considerably milder than for the younger group; offendersages 25 or older generally show no growth in gun-related homicide whatsoever. In addition, there is no detectable surge in juvenile nongun homicide activity. Based on these findings, we conclude that the crack cocaine markets–gun availability linkage is highly plausible, and we suggest directions for future research in clarifying the dynamics of the late-1980s surge in juvenile homicide.     

INDUSTRIAL SHIFT,POLARIZED LABOR MARKETS AND URBAN VIOLENCE: MODELING THE DYNAMICS BETWEEN THE ECONOMIC TRANSFORMATION AND DISAGGREGATED HOMICIDE*

Industrial restructuring marks the removal of a manufacturing and production‐based economy in urban areas, which had served as a catalyst in concentrating disadvantage and polarizing labor markets since the 1970s. Although scholars have established a relationship between concentrated disadvantage — poverty, joblessness, racial residential segregation — and urban violence in cross‐sectional studies, this literature has yet to estimate whether economic restructuring contributed to the change in urban homicide over time. Modeling this relationship requires an analytical strategy that incorporates specific indicators of (race and gender) polarized labor markets, separate from indicators of urban disadvantage, on disaggregated homicides while taking into account the growing dependency of urban cities on formal social control (via police presence and rise in incarceration). In this study I provide a theoretical rationale for linking industrial restructuring to urban homicide. Using a multivariate strategy to capture the shift in labor market forces and disaggregated homicides from 1980 to 1990, I also estimate the impact of this relationship. The results provide evidence of the industrial ship and documents both the decline in Manufacturing jobs for black males and black females and a growth in the service sector opportunities for white males only. I also find that industrial restructuring had a unique impact on disaggregated homicide beyond what has previously been established in cross‐sectional studies.     

Comparing male and female juveniles charged with homicide: child maltreatment, substance abuse, and crime details

This study examines a sample of 136 male and female juveniles charged with attempted homicide or homicide. The purpose of this study is to explore the differences between nondirect file male and female juvenile homicide offenders regarding individual, family, and crime circumstances. Findings suggest that compared to male juvenile offenders, female juvenile homicide offenders have higher rates of reported childhood abuse, more serious substance abuse, and mental health problems including suicidal ideations, depression, anxiety, anger, and irritability. Male juvenile homicide offenders reported higher rates of substance use than their female counterparts but the females had more serious substance abuse problems. Female juveniles were found to more often kill a person known to them and male homicide offenders were found to more often kill a stranger. These findings suggest strongly that male and female juvenile homicide offenders are dissimilar and require unique assessment and treatment.     

Homicide Trends and Illicit Drug Markets: Exploring Differences Across Time

Ample speculation and some evidence suggests that the decline in homicide rates since the early 1990s was partially attributable to declining levels of drug market activity. This analysis explores that explanation, along with an alternative: the strength of the drug market–lethal violence relationship has weakened over time. We outline several conceptual reasons to expect period‐specific differences in the drug market–homicide relationship. These include the aging of market participants, shifts in the normative and transactional climate of markets, and changes in structural factors affecting the magnitude of the relationship between drug market indicators and homicide rates (such as socioeconomic disadvantage). These arguments are evaluated for a sample of large US cities. The results generally show a pattern of attenuation in the drug market–homicide relationship and lead us to conclude that part of the homicide decline is likely due to a drop in the amount of drug market activity, some of it is attributable to the aging of drug market participants, and some appears to be due to unmeasured factors which may have created a “kinder and gentler” drug market.     

Putting race into context: Race,juvenile justice processing,and urbanization

In this article, we examine differential sentencing patterns among black, Hispanic, and white juveniles and the context in which those decisions are made. Using a bivariate probit model, we show that juveniles living in urban counties are more likely to be referred to juvenile court, and that juveniles living in a single-mother household are more likely than juveniles living with both parents to be referred to court and to receive secure placement. Race-specific models indicate that black youths are likely to receive harsh treatments in urban courts; yet white youths are not treated differently on the basis of court location. In addition, living in a single-mother household is a disadvantage for white youths when they are referred and sentenced, but family status is not a determinant for black youths.     

Homicide of children and adolescents in Mexico (1990–2013)

The trends and correlates of child and juvenile homicide rates in three developmental age groups (0-5, 6-11, and 12-17) during 1990–2013 in Mexico are examined by using vital statistical data. Homicide rates for adults and children were calculated yearly and the place where homicides occurred and the means used to commit homicide examined. Changes and continuities in homicide rates during 2002–2007 and 2008–2013 and their association with socio-economic, status of women, public security efforts, and firearm availability variables were studied. Homicide rates increased rapidly for adults and children in 2008 as did the rates in which a firearm was used. Rates for adults and children 0–5 years were particularly correlated. In some states, the youngest children’s rates increased by 75% or more than the rates for adults. High-increase states for younger children were closer to the U.S. border, were farther from abortion services, and had growing rates of female-headed households.     

Male and female juveniles arrested for murder: a comprehensive analysis of U.S. data by offender gender

Murders committed by juveniles remain a serious concern in the United States. Most studies on juvenile homicide offenders (JHOs) have used small samples and have concentrated on male offenders. As a result, little is known about female JHOs and how they differ from their male counterparts on a national level. This study utilized the Supplementary Homicide Report (SHR) database to examine more than 40,000 murders committed by male and female juvenile offenders from 1976 to 2005. This research effort, the most expansive to date, replicated previous findings with respect to gender differences using bivariate and multivariate analyses. As predicted, six variables used to test eight hypotheses with respect to male and female JHOs in single-victim incidents were significant (victim age, victim-offender relationship, murder weapon, offender count, victim gender, and homicide circumstance). Regression analysis revealed that all variables remained significant when entered into the model. This article concludes with a discussion of our findings and directions for future research.     

EXAMINING THE CONDITIONAL NATURE OF THE ILLICIT DRUG MARKET-HOMICIDE RELATIONSHIP: A PARTIAL TEST OF THE THEORY OF CONTINGENT CAUSATION

Recently, Zimring and Hawkins (1997) have suggested that drug markets are a “contingent cause” of the increase in homicide rates. That is, where structural conditions known to produce violence are already in place, the drug distribution‐homicide link may be exacerbated. This analysis uses hierarchical linear modeling to investigate two key research questions: (1) Is within‐city variation in illicit drug market activity positively associated with within‐city variation in homicide rates during the 1984–1997 period? (2) Is the illicit drug market‐homicide association contingent on preexisting violence conducive socioeconomic conditions? Using three measures of drug market activity, analyses provide affirmative evidence on both questions. Theoretical and research implications of these findings are discussed.     

Fatal Firearm Injuries in Tennessee: A Comparison Study of Tennessee's Two Most Populous Counties 2009–2012

Firearm injuries are a leading cause of violent death in Tennessee. This study was designed to compare the demographic and epidemiologic features of fatal firearm injuries in Shelby County and Davidson County, Tennessee between 2009 and 2012. We identified 1081 gunshot fatalities for the study period in these two counties. Shelby County had a higher overall, age‐adjusted gunshot mortality rate, a higher male age‐adjusted gunshot mortality rate, and a higher age‐adjusted gunshot homicide rate than Davidson. Age groups 25–34 years and 35–44 years had higher crude mortality rates for gunshot deaths in Shelby County than Davidson County. Both counties had higher age‐adjusted gunshot mortality rates for black males than white males, higher homicide rate for black race than white, and higher suicide rate for white race than black. Homicide was the most common manner of death, and handguns were the most common type of firearm used in both counties.     

The relationship between substance use, drug selling, and lethal violence in 25 juvenile murderers

The goal of the present study was to determine the relationship between substance use, drug selling, and lethal violence in adolescent male homicide offenders and their victims. The study employed a retrospective review of criminal justice databases and medical examiner records for murders committed by 25 adolescent males incarcerated in the Commonwealth of Virginia juvenile correctional centers from February 1992 to July 1996. The perpetrator sample was 84% African American and 16% white. The average age at the time of the offense was 15.0 years (range = 13.0 to 17.7 years). The victims were 84% male, 60% African American and 32% white. The median victim age was 28.0 years (mean = 34.8, range = 17 months to 75 years). The results indicated that 52% of the murders were committed by juveniles with identified involvement in drug selling, and 28% of the murders were drug-related. Toxicology results indicated recent drug or alcohol use in 27% of the victims; while 74% of the perpetrators reported substance use, 35% indicating daily use. Using discriminant analysis, it was possible to accurately classify 86% of the drug-related murders with the variables of recent victim drug use and perpetrator substance use history. The results indicated that adolescent males involved in the sale and distribution of illegal drugs comprised a significant percentage of those incarcerated for murder. Recent victim drug use and perpetrator substance use may be important variables in identifying drug-related juvenile homicides. These results underscore the link between substance use, drug selling, and lethal violence.     

Putting homicide followed by suicide in context: Do macro‐environmental characteristics impact the odds of committing suicide after homicide?*

Homicide followed by suicide remains an understudied phenomenon in the criminological literature. This is due, in part, to methodological and statistical limitations—much of the extant research includes small samples and has not kept pace with quantitative advances. Moreover, scholarship on homicide–suicide has been focused almost exclusively on individual risk factors, discounting contextual influences. In this study, we examine whether macro‐environmental characteristics affect the odds of suicide after a homicide. We use data on 24,373 homicide and homicide–suicide cases distributed across 3,019 cities and 48 U.S. states from the National Violent Death Reporting System to examine the direct effects of structural factors on the odds of suicide after a homicide; and whether structural characteristics condition the impact of the victim–offender relationship on the odds of homicide–suicide. Hierarchical logistic regression models indicate that macro‐level concentrated disadvantage decreases the odds of homicide–suicide. Furthermore, concentrated disadvantage attenuates the odds of suicide after the homicide of an intimate partner, child, family member, or friend, relative to the killing of a stranger. The findings reveal that researchers should account for the context in which homicide–suicide occurs; failure to do so may unintentionally discount a key correlate of homicide–suicide and artificially inflate the effects of the micro‐environment.     

THE “TRUE” JUVENILE OFFENDER: AGE EFFECTS AND JUVENILE COURT SANCTIONING

Age is the only factor used to demarcate the boundary between juvenile and adult justice. However, little research has examined how age guides the juvenile court in determining which youth within the juvenile justice system merit particular dispositions, especially those that reflect the court's emphasis on rehabilitation. Drawing on scholarship on the court's origins, attribution theory, and cognitive heuristics, we hypothesize that the court focuses on youth in the middle of the range of the court's age of jurisdiction—characterized in this article as “true” juveniles—who may be viewed as meriting more specialized intervention. We use data from Florida for court referrals in 2008 (N = 71,388) to examine the decision to proceed formally or informally and, in turn, to examine formally processed youth dispositions (dismissal, diversion, probation, commitment, and transfer) and informally processed youth dispositions (dismissal, diversion, and probation). The analyses provide partial support for the hypothesis. The very young were more likely to be informally processed; however, among the informally processed youth, the youngest, not “true” juveniles, were most likely to be diverted or placed on probation. By contrast, among formally processed youth, “true” juveniles were most likely to receive traditional juvenile court responses, such as diversion or probation.     

CONCENTRATED DISADVANTAGE,TRADITIONAL MALE ROLE MODELS,AND AFRICAN‐AMERICAN JUVENILE VIOLENCE*

In a stagnating urban economy, Elijah Anderson's (1999) Code of the Street depicts a disadvantaged environment where residents face high levels of joblessness, poverty, racial residential isolation, and family disruption. Anderson argues that the loss of job opportunities for African‐American men deprived younger generations of traditional male role models. That is, in a disadvantaged urban setting with a lack of male role models participating in legitimate labor market activity, many young people may turn to violence. Drawing on insights from Anderson's ethnographic work, we assess the generality of Anderson's claims more broadly and explore the potential connection between his work and the macrolevel research on urban violence. Specifically, we explore the influence of male role models (older, employed black males) and the concentration of urban disadvantage on black juvenile arrests for violence across multiple cities in 2000. Overall, we find empirical support for Anderson's concerns over the removal of traditional male role models from urban areas as a result of concentrated disadvantage. Specifically, we find that the presence of traditional male role models reduces the rates of African‐American youth violence. Additionally, our measure of traditional male role models mediates the relationship between structural disadvantage and juvenile violence. We discuss the contributions of Anderson's work to the macrolevel study of urban violence.     

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.     

Societal views of justice for adolescents accused of murder

Examines citizens' views about when juveniles accused of homicide should be tried and punished as adults. Responses from two randomly selected samples of adult Georgia residents suggest that these views are strongly influenced by whether adolescent defendants have been victims of abuse. Laypersons prefer juvenile court for juveniles who kill abusive parents (76% for first time offenders. 77% for those with one prior adjudication). Respondents are split concerning how to punish abused juveniles who have two prior adjudications (49% recommend juvenile court) and abused juveniles with one prior offense who kill a neighbor (48% recommend juvenile court). Most respondents, however, prefer adult court for repeat offenders who kill and have no history of child abuse. These findings suggest that legislative automatic transfers are overly simplistic compared to the contextual sensitivity of community sentiment. Policymakers may have serious misconceptions of societal views of fairness in this area.     

Armed Americans: The impact of firearm availability on national homicide rates

This study examines the relationship between firearm availability and national homicide rates. The theoretical and empirical literatures are reviewed, and a cross-national two-stage least squares regression analysis is described. The relationship between a circa 1990 measure of firearm availability and the average 1990–1994 homicide rate is examined across 36 countries. Two-stage least squares regression, which controls for homicide's effect on firearm availability in addition to a number of other confounding factors, reveals a statistically significant positive effect of firearm availability on national homicide rates. The magnitude of the association is considerable. The observed relationship is found to be insensitive to sample composition. Results also indicate that homicide rates do not influence levels of firearm availability. The limitations of the study and avenues for future research are discussed.     

Licensed firearm dealers,legal compliance,and local homicide: A case study

Research summary

This study uses a combination of tract-level and street network-level analyses to examine: (1) the overall association between federally licensed firearm dealers (FFLs) and homicides, (2) the relationship between dealers with serious violations (such as selling to prohibited buyers or failing to record sales) and homicide, and (3) whether the dealer–homicide association is moderated by community disadvantage. Results replicate and confirm a relationship between dealers and homicides in disadvantaged neighborhoods. Importantly, however, we also find that proximity to noncompliant dealers specifically elevates the risk of lethal violence.

Policy implications

We detail how a coordinated effort between federal, state, and local agencies to regulate firearm dealers and ensure that legal compliance can be instrumental in reducing gun violence. There is a clear need for increased oversight of gun dealers and more robust policies that hold negligent dealers accountable, including the necessary funding and regulatory manpower to enable regular auditing and support consistent follow-up for noncompliant dealers. A comprehensive policy framework that supports supply-side gun violence reduction should include additions to state-level laws that require record keeping, videotaping and store security, and regular inspection for firearm dealers.     

Adolescent and young adult suicide: a 10-year retrospective review of Kentucky Medical Examiner cases

The compilation of all suicidal causes of death attained the third highest ranking of mortality between the ages of 15 and 24 following unintentional deaths and homicide in the United States, accounting for approximately 4000 deaths in 2002. A variety of biopsychosocial factors may contribute to adolescent suicidal behavior, including psychiatric disorders, risk-taking behaviors, and lack of a cohesive family unit. The authors conducted a 10-year (1993-2002) retrospective review of 108 Medical Examiner cases of suicide ages 11-17 and 358 cases ages 18-24 in Kentucky, which represents two thirds of the Coroner cases in the state. The majority of victims were male and Caucasian. The major causes of death were the same for the two age groups, specifically, firearm injury (72.2% and 70.7%), hanging (22.2% and 18.7%), and drug intoxication (2.8% and 5.3%). An integrated Coroner-Medical Examiner system profits in the public health arena by providing collaborative research data for policy decisions. The prevalence of youth suicide by firearm should prompt further discussion regarding ways to better identify high-risk adolescents and young adults and restrict pediatric access to unsecured household firearms.     

Facilitating Violence: A Comparison of Gang-Motivated, Gang-Affiliated, and Nongang Youth Homicides

It is well established that gangs facilitate violent offending by members,but the mechanisms by which that facilitation occurs remain unclear. Gangsmay promote violence indirectly by facilitating members' access to riskysituations such as drug markets or directly through gang functions such asturf defense. We explore alternative modes of facilitation in a comparisonof gang-affiliated homicides (which involve gang members but do not resultfrom gang activity), gang-motivated homicides (which result from gangactivity), and nongang youth homicides in St. Louis. We find importantdifferences as well as similarities in the time trends and eventcharacteristic of the two types of gang homicide; in key respects thegang-affiliated homicides more closely resemble the nongang events. Thegang-motivated events exhibit a somewhat distinctive spatial patterning,as might be expected from their connection to turf conflicts. However, allthree homicide types are highly concentrated in racially isolated,disadvantaged neighborhoods, which remain the fundamental socialfacilitators of both gang and nongang violence.