Over the last 20 years, numerous studies have confirmed that children who experience maltreatment are more likely to be referred/arrested for delinquent offenses. Maltreated children have also been found to more likely become involved in the adult criminal justice system. In fact, a 2004 National Institute of Justice study found maltreated children to be 11 times more likely than a matched control group to be arrested, and 2.7 times more likely to be arrested as an adult.
In 2011, the California Senate Office of Research released findings about the foster care experiences of California prison inmates who were scheduled to be paroled within eight months of June 2008. This research found that of the 2,549 polled inmates, 316 men and 40 women (14%) had been in foster care sometime during their youth and half of this percentage had been placed in group homes.
As a result of these studies, several child protective service (CPS) agencies, including the Department of Children and Family Services in Los Angeles County (LA), have joined forces with their counterparts in the juvenile justice system to collaboratively service youth who were concurrently involved in both of these systems. These youth are commonly referred to as “crossover” youth. While LA was observing some initial positive outcomes from these teaming efforts, two leaders  involved in the effort wondered if it was possible through research to identify which of the maltreated children were the most likely to become delinquent. If this was possible, then perhaps new practices could be adopted to prevent these youth from becoming delinquent, thereby increasing the likelihood that these most at-risk youth would become productive adults versus adult criminals.