The purpose of this report is to examine methamphetamine use among adult arrestees and juvenile detainees in Maricopa County, Arizona. We relied on data from the Arizona Arrestee Reporting Information Network (AARIN) to address the following five questions:
1. What percent of adult arrestees are methamphetamine users and what are their social characteristics?
2. What is the relationship between methamphetamine use and arresting offense?
3. What is the relationship between methamphetamine use by parents and the presence of children in the household?
4. What percent of methamphetamine users are receiving treatment for their drug use?
5. What percent of juvenile detainees are methamphetamine users and what are their social and legal characteristics?

The purpose of this report is to use data from a sample of recently booked arrestees in Maricopa County to examine the scope and nature of Maricopa County’s gang problem. In particular, this report supplements data presented in the bi-annual report on gangs conducted by the Arizona Criminal Justice Commission, which relies on official police data and their occasional white paper on gangs that relies on self-report data from school youth. We organized our analyses around six research questions: (1) what proportion of adult arrestees are involved in a gang, and what are the socio-demographic differences between those who are associated with a gang and those who are not; (2) what are the rituals associated with gang joining; (3) how do gang and non-gang arrestees differ in their experiences with crime, drug use and victimization; (4) what is the organizational structure and composition of gangs; (5) how do members socially identify with their gang; and (6) how and why do members leave their gang?