Two presentations address the design, execution, and extensions of ADAM and drug use among San Diego, CA, arrestees. One paper presents an overview of San Diego's substance abuse monitoring program and law enforcement's need and use of local information. Two papers discuss operational and quality issues associated with computer-assisted interviewing for ADAM. Patterns in drug-related emergency department visits linked to the Drug Abuse Warning Network (DAWN) are addressed in another presentation. One presentation considers the advantages and disadvantages of drug testing in alternative matrices, and another presentation profiles the Arizona Arrestee Reporting Information Network. Using the ADAM drug use calendar to model patterns of illicit drug use is the focus of one presentation; and a related paper demonstrates the utility of ADAM's drug-use calendar for a group-based trajectory analysis of crack cocaine use among adult male arrestees. A paper discusses the assessment of dependence, comorbidity, and trauma. Both a paper and a presentation focus on statistical issues related to prevalence estimates and trends in ADAM data. Remaining papers and presentations address female offender drug use and related issues; collecting sensitive information from drug users; the use of Bureau of Economic Analysis areas and regions for representing geographic variation; and DAWN data and reporting.