By Anti-Defamation League

Every year, individuals with ties to different extreme causes and movements kill people in the United States; the ADL Center on Extremism (COE) tracks these murders. Extremists regularly commit murders in the service of their ideology, to further a group or gang they may belong to, or even while engaging in traditional, non-ideological criminal activities. In 2023, domestic extremists killed at least 17 people in the U.S., in seven separate incidents. This represents a sharp decrease from the 27 extremist-related murders ADL has documented for 2022—which itself was a decrease from the 35 identified in 2021. It continues a trend of fewer extremist-related killings after a five-year span of 47-79 extremist-related murders per year (2015- 2019). One reason for the trend is the decrease in recent years of extremist-related killings by domestic Islamist extremists and left-wing extremists. The 2023 murder totals include two extremist-related shootings sprees, both by white supremacists, which together accounted for 11 of the 17 deaths. A third shooting spree, also by an apparent white supremacist, wounded several people but luckily did not result in fatalities. All the extremist-related murders in 2023 were committed by right-wing extremists of various kinds, with 15 of the 17 killings involving perpetrators or accomplices with white supremacist connections. This is the second year in a row that right-wing extremists have been connected to all identified extremist-related killings. Two of the incidents from 2023 involved women playing some role in the killing or its aftermath. This report includes a special section that examines the role played by women in deadly extremist violence in the United States by analyzing 50 incidents from the past 20 years in which women were involved in some fashion in extremist-related killings. Murder & Extremism in the United States in 2023

New York: Anti-Defamation League, 2024. 36p.

By Caroline Logan, Randy Borum, and Paul Gill

Violent extremism has galvanized public fear and attention. Driven by their concerns, the public has pushed for law enforcement and mental health systems to prevent attacks rather than just respond to them after they occur. The prevention process requires guidance for practitioners and policymakers on how best to identify people who may be at risk, to understand and assess the nature and function of the harm they may cause, and to manage them to mitigate or prevent harm. Violent Extremism provides such guidance.

Over 10 chapters, prepared by leading experts, this handbook illuminates the nature of violent extremism and the evolution of prevention-driven practice. Authors draw on the literature and their experience to explain which factors might increase (risk factors) or decrease (protective factors) risk, how those factors might operate, and how practitioners can prepare risk formulations and scenario plans that inform risk management strategies to prevent violent extremist harm.

Each chapter is crafted to support thoughtful, evidence-based practice that is transparent, accountable and ultimately defensible. Written for an international audience, the volume will be of interest to law enforcement and mental health professionals, criminal justice and security personnel, as well as criminologists, policymakers and researchers.

London, UCL Press. 2023, 319pg