Gangs Social conditions 56 Juvenile delinquency 45 History 40 Gang members 33 Crime 32 Murder 32 更多 ... Violence 32 Organized crime 31 Criminals 30 Criminal behavior 28 Criminal investigation 23 Social aspects 20 Gang prevention 15 Law enforcement 15 Youth 15 Juvenile delinquents 14 Prevention 14 Youth and violence 14 Drug traffic 13 African Americans 12 Police 11 Social life and customs 10 Violent crimes 10 Teenagers 8 African American youth 7 Female juvenile delinquents 7 Hispanic American gangs 7 Mexican American youth 7 Prison gangs 7 少 ...