The analysis plan and the format of this report are derived from numerous meetings held over more than an eighteen month span with the AARIN project advisory board, Maricopa County leadership, and representatives from JPD. Following the guidance of the advisory board, the dissemination strategy for the AARIN project shifted from a single, broadly scoped annual summary report supplemented by smaller topic-specific reports into shorter, individual reports tailored to the specific needs and wants of six key county criminal justice agencies. Meetings with JPD representatives regarding their individualized report indicated they would be most interested in a broad analysis akin to the traditional AARIN annual reports. A key modification to this broad traditional analysis strategy, this report compares juvenile detainees in three categories of probation history – never served probation (or not in the past 12 months), served probation in a county other than Maricopa, and served probation in Maricopa County, each defined for either lifetime or the past 12 months, ultimately yielding six analysis categories. Each of the three probation categories are mutually exclusive within a given time period (i.e. lifetime and past 12 months). Given the JPD’s need for the broadly scoped analysis as opposed to a topically-focused and interpretive report, the report here primarily provides analyses across most of the core instrument elements, presented in tabular form, with a list of key findings and highlights.