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The majority of youth join gangs between ages 11 and 15. Early prevention efforts can keep them safe. #BacktoSchool


NIJ supports research to learn the effects of and inform public policies on sex offender management. Registration and notification laws are meant to help law enforcement monitor convicted sex offenders, help residents protect themselves and their children, and deter crime.

Read our updated topic pages.

NIJ is seeking comment on two draft documents related to a Mobile License Plate Reader Systems Standard for use by criminal justice agencies. These documents are available in the Federal Register for 45 days to allow for industry representatives, criminal justice agencies, research communities and the general public to comment.

Learn more.

Youth who fight with their siblings and girls who are exposed to family conflict were more likely to engage in bullying at school. Youth who bullied others in middle school were then more likely to continue bullying others in high school and engage in more serious forms of aggression in romantic relationships.

Read Bullying, Sexual, and Dating Violence Trajectories From Early to Late Adolescence (pdf, 74 pages).

The latest bulletin in the NIJ/OJJDP Study Group on the Transition From Juvenile Delinquency to Adult Crime is now available!

Working to Identify Missing Persons

Outline of a woman's face.

The National Missing and Unidentified Persons System (NamUs) is a powerful tool to assist law enforcement officers, medical examiners, and the family members of missing persons in solving cold cases. Learn more about NamUs.

Practitioner Scholarships for IACP Conference

Apply for a scholarship to attend the International Association of Chiefs of Police Annual Conference and Expo in October. The scholarships are for mid-rank law enforcement officers and will cover travel, conference registration, per diem expenses and accommodations.