In December 2013, The California Endowment funded the National Council on Crime and Delinquency (NCCD) and Third Sector Capital Partners, Inc. (Third Sector) to conduct a feasibility analysis to identify and define the need for delinquency prevention services among a child welfare population to better understand its potential for a Pay for Success (PFS) project. NCCD and Third Sector focused this feasibility analysis on San Diego County, California, where the county had recently implemented the Georgetown University Center for Juvenile Justice crossover practice model for serving youth who are dually involved in both the child welfare and juvenile justice systems. As a way to build on these efforts, the San Diego County Health and Human Services Agency and Child Welfare Services expressed interest in undertaking PFS exploration activities related to interventions that could prevent the occurrence of youth crossover from child welfare to juvenile justice, beginning with an analysis to identify the target population.