By Stacy Calhoun

This randomized controlled trial to assess the effectiveness of a curriculum-based gang prevention program in addressing gang risk factors within a school setting encountered delays and challenges in implementing the program and completing the study. Despite challenges, progress was made as the clinic adapted to the evolving circumstances. Although the clinic lost its dedicated space, it successfully established Memorandums of Understanding (MOUs) with two new school districts where they implemented their universal screening program and services at one middle school and two high schools. Despite efforts by the clinic team, school staff, and SSGP facilitator to enhance student engagement during the project performance period through special events, motivating students to submit signed enrollment forms and to attend clinic and group appointments remained challenging. Participation in this study allowed the clinic to significantly expand its focus, addressing gang risk factors on a much broader scale than before. Despite facing substantial challenges, including adapting to COVID-19 disruptions, forming relationships in new school districts with differing policies, and coping with the loss of dedicated clinical space and staff, the clinic has remained committed to refining their processes to better support these students. Moreover, the clinic has taken a proactive role in educating stakeholders about the potential of integrating gang prevention services within school-based systems of care.

Los Angeles: Department of Psychiatry and Biobehavioral Sciences University of California, Los Angeles, 2024. 29p.

By Grahame Allen, Helen Wong

Knife-related crime (knife crime) is a crime involving an object with a blade or sharp instrument. Knife crime data is published by the Office for National Statistics (ONS), government departments, police forces and the NHS. This briefing focuses on knife crime statistics for England and Wales. Some of the statistics go up to March 2024, whereas others only go up to March 2023. Further information on knife crime in England and Wales: possession offences, rules for retailers and efforts to prevent serious violence can be found in the Library briefing: Knives, offensive weapons and serious violence

Offences involving a knife The ONS publishes data on crimes recorded by police involving a knife or sharp instrument for a selection of serious violent offences. In the year ending March 2024, there were around 50,500 offences involving a sharp instrument in England and Wales (excluding Greater Manchester). This was 4.4% higher than in 2022/23 and 2.8% lower than in 2019/20.

Homicide offences In the year ending March 2023, Home Office data shows there were 244 homicides (the killing of one person by another) using a sharp instrument, including knives and broken bottles. This meant sharp instruments were used in 41% of the 594 homicides that occurred in England and Wales in 2022/23. Knife crime by police force area ONS data shows that in 2023/24, West Midlands Police recorded the highest rate of 178 offences per 100,000 population. In contrast, Dyfed-Powys Police recorded the lowest rate of 29 offences per 100,000 population. Proven offences and offenders Sentencing statistics from the Ministry of Justice show that in the year ending March 2023, there were almost 18,500 cautions and convictions made for possession of a knife or offensive weapon. Juveniles (aged 10 to 17) were the offenders in around 17.3% of cases. Hospital admissions Police and courts crime data depends on offences being reported to the authorities; this won’t capture all instances of knife crime because some offences may not be reported. It is therefore useful to supplement this information with alternative sources such as NHS hospital data. Data from NHS Digital shows there were 3,900 “hospital episodes” recorded in English hospitals in 2023/24 due to assault by a sharp object. This was a 3.3% increase compared 2022/23, and a 7% increase compared to 2014/15. Scotland and Northern Ireland The data above are for England and Wales. Data for Scotland on the number of crimes involving the possession of an article with a blade or point can be found in table A8 of the Recorded Crime in Scotland 2023-24 publication. Table 7 of Homicide in Scotland 2023-24 shows the victims of homicide by main method of killing, including those where a sharp instrument was used.

Statistics on knife crime in Northern Ireland can be found in the latest Police Recorded Crime Statistics Monthly update from the Police Service of Northern Ireland.

London: House of Commons Library, 2025. 30p.

BY Lyn Mikel Brown

For some time, reality TV, talk shows, soap-operas, and sitcoms have turned their spotlights on women and girls who thrive on competition and nastiness. Few fairytales lack the evil stepmother, wicked witch, or jealous sister. Even cartoons feature mean and sassy girls who only become sweet and innocent when adults appear. And recently, popular books and magazines have turned their gaze away from ways of positively influencing girls' independence and self-esteem and towards the topic of girls' meanness to other girls. What does this say about the way our culture views girlhood? How much do these portrayals affect the way girls view themselves?

In Girlfighting, psychologist and educator Lyn Mikel Brown scrutinizes the way our culture nurtures and reinforces this sort of meanness in girls. She argues that the old adage “girls will be girls”—gossipy, competitive, cliquish, backstabbing— and the idea that fighting is part of a developmental stage or a rite-of-passage, are not acceptable explanations. Instead, she asserts, girls are discouraged from expressing strong feelings and are pressured to fulfill unrealistic expectations, to be popular, and struggle to find their way in a society that still reinforces gender stereotypes and places greater value on boys. Under such pressure, in their frustration and anger, girls (often unconsciously) find it less risky to take out their fears and anxieties on other girls instead of challenging the ways boys treat them, the way the media represents them, or the way the culture at large supports sexist practices.

Girlfighting traces the changes in girls' thoughts, actions and feelings from childhood into young adulthood, providing the developmental understanding and theoretical explanation often lacking in other conversations. Through interviews with over 400 girls of diverse racial, economic, and geographic backgrounds, Brown chronicles the labyrinthine journey girls take from direct and outspoken children who like and trust other girls, to distrusting and competitive young women. She argues that this familiar pathway can and should be interrupted and provides ways to move beyond girlfighting to build girl allies and to support coalitions among girls.

By allowing the voices of girls to be heard, Brown demonstrates the complex and often contradictory realities girls face, helping us to better understand and critique the socializing forces in their lives and challenging us to rethink the messages we send them.

New York; London: NYU Press, 2003. 259p.

By Cindy D. Ness

In low-income U.S. cities, street fights between teenage girls are common. These fights take place at school, on street corners, or in parks, when one girl provokes another to the point that she must either “step up” or be labeled a “punk.” Typically, when girls engage in violence that is not strictly self-defense, they are labeled “delinquent,” their actions taken as a sign of emotional pathology. However, in Why Girls Fight, Cindy D. Ness demonstrates that in poor urban areas this kind of street fighting is seen as a normal part of girlhood and a necessary way to earn respect among peers, as well as a way for girls to attain a sense of mastery and self-esteem in a social setting where legal opportunities for achievement are not otherwise easily available.
Ness spent almost two years in west and northeast Philadelphia to get a sense of how teenage girls experience inflicting physical harm and the meanings they assign to it. While most existing work on girls’ violence deals exclusively with gangs, Ness sheds new light on the everyday street fighting of urban girls, arguing that different cultural standards associated with race and class influence the relationship that girls have to physical aggression.

New York; London: NYU Press, 2010. 198p.

By Maury Nation

The author reports on the motivation for developing and performing the Nashville Longitudinal Study of Youth Safety and Wellbeing (NLSYSW) as well as the project’s activities and outcomes, and resulting artifacts. The work of the NLSYSW was organized into working groups corresponding to the principal required tasks to develop the multi-sectoral dataset. The four data collection working groups focused on the following: Metropolitan Nashville Public Schools (MNPS) administrative data; MNPS survey data; contextual data; and youth mapping data. Two data management working groups focused on data anonymization and data archiving. The report describes the major tasks of each working group, the impact of the Covid-19 pandemic disruptions, and NLSYSW outputs and artifacts. The major output of the study was a compilation of multiple data sources with over two million observations and 450 variables; the report provides a list of data sources with the years of data included and a short description of each data set, and directs readers to the user guide and codebook sections for complete details.

Nashville, TN: Vanderbilt University, 2023. 167p.

Edited by Cynthia J. Arnson and Eric L. Olson

In early May 2011, dozens of gunmen entered a farm in Guatemala’s Petén region, murdering and decapitating 27 people. Guatemalan authorities as well as speculation in the press have blamed the Zetas, a violent Mexican drug trafficking cartel increasingly active in Guatemala and other parts of Central America . Whether a vengeance killing following the murder of a presumed drug lord, or a struggle amongst the Zetas and Mexico’s Sinaloa cartel for the control of territory and smuggling routes, the massacre underscores the vulnerability of the civilian population in unsecured border areas between Mexico and Guatemala, where narcotics and human trafficking flourish. In response, the government of President Álvaro Colom declared a state of siege similar to the one declared from December 2010-February 2011 in the department of Alta Verapaz. This incident and others like it underscore the serious threat to democratic governance, human rights, and the rule of law posed by organized crime in Central America. The international community has begun to address the burgeoning crisis and commit significant resources to the fight against crime and violence; indeed, not since the Central American wars of the 1980s-1980s has the region commanded so much attention in the international arena. To better understand the nature, origins, and evolution of organized crime in Central America, and thereby contribute to the efforts of policymakers and civil society to address it, the Latin American Program commissioned a series of case studies that looked at the countries of the so-called Northern Triangle—El Salvador, Guatemala, and Honduras— and at the broader regional context affecting national dynamics. Our interest was to understand more fully how organized crime has evolved in Central America, and to examine the links between organized crime and traffickers in Central America, Mexico and Colombia. What role does Central America play in the supply chain for illegal goods between the Andes and the United States, and how have trafficking organizations from these areas related to one another over time? The growing presence and activities of organized crime groups in Central America has worsened an already alarming crisis of citizen security. In mid- 2010, the Inter-American Commission on Human Rights reported that Latin America had the highest levels of youth violence in the world . UN figures indicate that the rate of youth homicide in Latin America is more than double that of Africa, and 36 times the rate of developed countries . An oft-referenced study by the United Nations Development Program (UNDP) noted in 2009 that the seven countries of Central America—Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, and Panama—register the highest levels of non-political violence in the world; this observation has been echoed in statements by the U.S. Department of Defense . The situation is most acute in the countries of the Northern Triangle6 . In El Salvador alone, sixty-eight percent of homicide victims are between the ages of fifteen and thirty-four, and nine out of ten victims are male7 . Countries such as Costa Rica, Nicaragua, and Belize are also witnessing rising rates of insecurity associated with the increased presence of organized crime.

Washington, DC: Woodrow Wilson International Center for Scholars, Latin American Program, 2011. 254p.

By Kimberly Heinle, Octavio Rodríguez Ferreira, and David A. Shirk

This is one of a series of special reports that have been published on a semi-annual by Justice in Mexico since 2010, each of which examines issues related to crime and violence, judicial sector reform, and human rights in Mexico. The Drug Violence in Mexico report series examines patterns of crime and violence attributable to organized crime, and particularly drug trafficking organizations in Mexico. This report was authored by Kimberly Heinle, Octavio Rodríguez Ferreira, and David A. Shirk, and builds on the work of past reports in this series. The report was formally released on April 10, 2014 and was made possible by the generous support of The John D. and Catherine T. MacArthur Foundation. This report does not represent the views or opinions of the University of San Diego or Justice in Mexico’s sponsoring organizations.

San Diego: Justice in Mexico, University of San Diego, 2016. 58p.

By Nathan P. Jones

This report seeks to understand and define the gang issue in Mexico, establish the regional histories and sociologies of what is known about these gangs, and understand the causes of youth gang involvement. The paper briefly describes U.S.-Mexico bilateral efforts on youth gang prevention via the Merida Initiative, and identifies a sampling of existing civil society groups and programs geared specifically toward addressing youth gangs in Mexico and Central America. The report concludes with a set of policy recommendations for the U.S. and Mexican governments on how to best support civil society and strengthen relevant state institutions.

Washington DC: Woodrow Wilson Center for International Scholars; Trans-Border Institute, San Diego: University of San Diego; 2013. 46p.