These data are part of NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except for the removal of direct identifiers. Users should refer to the accompanying readme file for a brief description of the files available with this collection and consult the investigator(s) if further information is needed.Prior to 1996, surveys pertaining to youth gangs in the United States were conducted infrequently, and methodology and samples had been inconsistent. No single source of data pertaining to the nature, size, and scope of youth gangs existed. From 1996 through 2012, the National Youth Gang Survey (NYGS) collected data annually from a large, representative sample of local law enforcement agencies to track the span and seriousness of gang activity nationwide. The NYGS collected data from a sample of the universe of law enforcement agencies in the United States from which data can be extrapolated to determine the scope of youth gangs nationally.This collection includes one SPSS data file "1996-2001_cleaned_for_NACJD.sav" with 330 variables and 3,018 cases.

These data are part of NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except for the removal of direct identifiers. Users should refer to the accompanying readme file for a brief description of the files available with this collection and consult the investigator(s) if further information is needed. The National Youth Gang Survey (NYGS) 2002-2012 is a continuation of data collected annually from a representative sample of all law enforcement agencies in the United States that began in 1996. In 2002, the NYGS resampled law enforcement agencies based on updated data from the United States Census Bureau and the Federal Bureau of Investigation (FBI), and the NYGS continued to collect law enforcement data through 2012. This longitudinal study allows for examination of the trends in scope and magnitude of youth gangs nationally by measuring the presence, characteristics, and behaviors of local gangs in jurisdictions throughout the United States. This collection includes 1 SPSS data file with 2,388 cases and 606 variables.

The goal of this study was to provide useful data on how street gang crime patterns (by amount and type of offense) relate to common patterns of street gang structure, thus providing focused, data-based guidelines for gang control and intervention. The data collection consists of two components: (1) descriptions of cities' gang activities taken from an earlier study of gang migration in 1992, IMPACT OF GANG MIGRATION: EFFECTIVE RESPONSES BY LAW ENFORCEMENT AGENCIES IN THE UNITED STATES, 1992 (ICPSR 2570), and (2) gang structure data from 1995 interviews with police agencies in a sample of the same cities that responded to the 1992 survey. Information taken from the 1992 study includes the year of gang emergence in the city, numbers of active gangs and gang members, ethnic distribution of gang members, numbers of gang homicides and "drive-bys" in 1991, state in which the city is located, and population of the city. Information from the 1995 gang structures survey provides detail on the ethnic distributions of gangs, whether a predominant gang structure was present, each gang structure's typical size, and the total number of each of the five gang structures identified by the principal investigators -- chronic traditional, emergent traditional, emergent integrated, expanded integrated, and specialty integrated. City crime information was collected on the spread of arrests, number of serious arrests, volume and specialization of crime, arrest profile codes and history, uniform crime rate compared to city population, ratio of serious arrests to total arrests, and ratio of arrests to city population.

The 2007 Census of Law Enforcement Gang Units (CLEGU) collected data from all state and local law enforcement agencies with 100 or more sworn officers and at least one officer dedicated solely to addressing gangs and gang activities. Law enforcement agencies are often the first line of response to the gang problems experienced across the country and are a critical component of most anti-gang initiatives. One way for law enforcement agencies to address gang-related problems is to form specialized gang units. The consolidation of an agency's gang enforcement activities and resources into a single unit can allow gang unit officers to develop specific expertise and technical skills related to local gang characteristics and behaviors and gang prevention and suppression. No prior studies have collected data regarding the organization and operations of law enforcement gang units nationwide, the types of gang prevention tactics employed, or the characteristics and training of gang unit officers. This CLEGU collected data on the operations, workload, policies, and procedures of gang units in large state and local law enforcement agencies in order to expand knowledge of gang prevention and enforcement tactics. The CLEGU also collected summary measures of gang activity in the agencies' jurisdictions to allow for comparison across jurisdictions with similar gang problems.

These data are part of NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except for the removal of direct identifiers. Users should refer to the accompanying readme file for a brief description of the files available with this collection and consult the investigator(s) if further information is needed. This study used the National Incident-Based Reporting System (NIBRS) to explore whether changes in the 2000-2010 decade were associated with changes in the prevalence and nature of violence between and among Whites, Blacks, and Hispanics. This study also aimed to construct more accessible NIBRS cross-sectional and longitudinal databases containing race/ethnic-specific measures of violent victimization, offending, and arrest. Researchers used NIBRS extract files to examine the influence of recent social changes on violence for Whites, Blacks, and Hispanics, and used advanced imputation techniques to account for missing values on race/ethnic variables. Data for this study was also drawn from the National Historical Geographic Information System, the Census Gazetteer, and Law Enforcement Officers Killed or Assaulted (LEOKA). The collection includes 1 Stata data file with 614 cases and 159 variables and 2 Stata syntax files.

This study constituted a systematic national assessment of local law enforcement perceptions of the distribution of gang and gang-like problems in large cities in the United States, law enforcement reactions to gangs, and their policies toward gang problems. One purpose of the study was to examine changes in law enforcement perceptions of the U.S. gang problem that have occurred since NATIONAL YOUTH GANG INTERVENTION AND SUPPRESSION SURVEY, 1980-1987 (ICPSR 9792) was undertaken. The overall goal was to obtain as "conservative" as possible an estimate of the magnitude of the gang problem in the United States as reflected by the official reaction, record-keeping, and reporting of local law enforcement agencies. The agencies were asked to refer the interviewer to the individual representative of the agency who could provide the most information about the agency's processing of information on gangs and other youth-based groups engaged in criminal activity. To obtain each law enforcement agency's official, not personal, perspective on gang problems, anonymity was intentionally avoided. Each respondent was first asked whether the respondent's agency officially identified a "gang problem" within their jurisdiction. Gangs were defined for this study as groups involving youths engaging in criminal activity. Respondents were then asked if their department officially recognized the presence of other kinds of organized groups that engaged in criminal activity and involved youths and that might be identified by their department as crews, posses, or some other designation. Based on affirmative answers to questions on the officially recognized presence of gangs and the kinds of record-keeping employed by their departments, agencies were sent customized questionnaire packets asking for specifics on only those aspects of the gang problem that their representative had reported the agency kept information on. Variables include city name, state, ZIP code, whether the city participated in National Youth Gang Intervention and Suppression Survey, 1980-1987, and, if so, if the city reported a gang problem. Data on gangs include the number of homicides and other violent, property, drug-related, and vice offenses attributed to youth gangs and female gangs, total number of gang incidents, gangs, gang members, female gang members, and gangs comprised only of females for 1991, number of juvenile gang-related incidents and adult gang-related incidents in 1991, number of drive-by shootings involving gang members or female gang members in 1991, and numbers or percent estimates of gang members by ethnic groups for 1990 and 1991. Respondents also indicated whether various strategies for combating gang problems had been attempted by the department, and if so, how effective each of the crime prevention measures were.

These data are part of NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except for the removal of direct identifiers. Users should refer to the accompanying readme file for a brief description of the files available with this collection and consult the investigator(s) if further information is needed.This study addressed the dearth of information about facilitators of transnational organized crime (TOC) by developing a method for identifying criminal facilitators of TOC within existing datasets and extend the available descriptive information about facilitators through analysis of pre-sentence investigation reports (PSRs). The study involved a two-step process: the first step involved the development of a methodology for identifying TOCFs; the second step involved screening PSRs to validate the methodology and systematically collect data on facilitators and their organizations. Our ultimate goal was to develop a predictive model which can be applied to identify TOC facilitators in the data efficiently.The collection contains 1 syntax text file (TOCF_Summary_Stats_NACJD.sas). No data is included in this collection.

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