The adult criminal justice system is comprised of four components; legislation, law enforcement, courts, and corrections. Each of these four components is comprised of subcomponents. Furthermore, each component and subcomponent has a specific function. Typically, individuals who are involved in the criminal justice system move from one component to the next. Individuals are processed by each component, of the criminal justice system, if applicable, which has a unique function. Each of these criminal justice components and subcomponents contributes to unique circumstances among offenders and former offenders due to the role of each component. These circumstances may affect the types of interventions criminal justice populations receive, as well as intervention outcomes.
In general, the legislative component is responsible for enacting laws that define offending behavior, as well as supporting interventions and a host of other societal laws. For instance, since the mid-1990s, the Washington State legislature has enacted and supported legislation that promotes the use evidence-based interventions in the adult criminal justice system and juvenile justice system (Aos, Mayfield, Miller, & Yen, 2006).
The law enforcement component enforces laws and provides a variety of service functions, many of which are in response to non-crime situations. In law enforcement settings, evidence-based practice takes the form of using data and empirical evidence to improve policing outcomes. Examples include reducing crime incidents or diverting individuals to appropriate resources.
The court component is comprised of numerous court structures such as civil courts, adult criminal courts, and specialty courts such as drug courts, mental health courts, and domestic violence courts, among others. These courts hear specific types of cases. Courts provide justice in response to a range of criminal, non-criminal, and social matters. Justice options can include punishment, treatment focused on rehabilitation, or a combination of these two options.
The corrections component includes institutional facilities, such as city or county jails, and State, Federal and private prisons, as well as community-based supervision settings including probation and parole. A former offender released from prison may be placed on parole supervision while living in the community. The former offender may be mandated to comply with parole conditions or face violations, which could result in a variety of sanctions including re-incarceration. These conditions may be drug testing or participating in a treatment program, for example. Conversely, a parolee may be released from prison without conditions.
Undeniably, the criminal justice system is comprised of complex organizations. These organizations operate on many levels including local, state, federal, and tribal levels. These organizations share many common features although differences are found due to legislative and regional differences. Among these differences are the types of interventions provided to offenders and former offenders. Criminal justice systems vary in the level of interventions offered, some of which are legislated whereas others are not. For example, some police departments hire police social workers to assist them with their services functions. This is not mandated among all law enforcement agencies. On the other hand, physical and mental health services are mandated among correctional facilities.
Evidence-based practices can be implemented in each of the four components of the criminal justice system and integrated with processing procedures. Several recommendations have been developed. Chandler, Fletcher, and Volkow (2009) identified the criminal justice stages of entry, prosecution, adjudication, sentencing, corrections, and reentry. These stages trace offendersâ movement through the criminal justice components from arrest, through court, to incarceration or community-supervision. Interventions include screening and referrals, or community-based services, drug courts, and drug treatment throughout the components of the criminal justice system. The authors identified law enforcement officers, judges, prosecutors, juries, probation officers, correctional officers, and community-based service providers, among others as criminal justice practitioners capable of implementing effective interventions.
Another model suggests that the criminal justice settings of law enforcement, courts, jails, prisons, and probation and parole can separately provide interventions ranging from screening and integrated services to mental health and substance abuse treatment, including drug courts. When individuals with mental illness receive empirically supported interventions in each component of the criminal justice system, it will reduce processing in subsequent components of the criminal justice system (Kennedy-Hendricks, Huskamp, Rutkow, & Barry, 2016). This model is also applicable for individuals without mental illness, since diversion approaches can result in clinical interventions and less criminal justice system involvement.