This report was commissioned by the European Commission’s Directorate-General for Migration and Home Affairs, and its community for the Annual CERIS Fight against Crime and Terrorism event focusing on youth-related criminality and training for practitioners held on 30 September – 1 October 2025. Youth are implicated in, and disproportionately affected by, a broadening range of criminal phenomena: traditional offences (violent incidents, knife crime), drug-related offending (including darknet markets and party-drugs contexts), online harms (cybercrime, grooming, radicalisation) and exploitation (trafficking, social-media-facilitated recruitment). New vectors, such as social platforms, the ‘manosphere’, AI tools and gamified learning environments, are changing both how youth are recruited into crime and how they are victimised. Prevention that focuses on early intervention, parental and school support, place-based community responses, and targeted digital resilience yields the strongest evidence of reducing both perpetration and victimisation. We’re collecting feedback on this report, please leave your thoughts and comments anonymously through the following survey: https://ec.europa.eu/eusurvey/runner/enact-report-feedback