Which of the following best defines a "Criminal Justice Agency" according to ACJIS?

The definition of a "Criminal Justice Agency" according to ACJIS includes any state or local government agency that plays a role in the administration of criminal justice. This broad definition encompasses various entities that are integral to maintaining law and order, including police departments, courts, probation offices, and correctional institutions. Each of these agencies contributes to the overall justice system by enforcing laws, adjudicating offenses, and rehabilitating offenders.

In contrast, other options refer to entities that do not fit the jurisdictional or functional criteria set for criminal justice agencies. A private entity providing legal advice is not a governmental body and therefore does not participate in the public administration of justice. A non-profit organization focused on crime prevention, while important, operates outside the scope of formal criminal justice administration. Lastly, a federal agency that oversees law enforcement nationwide may have a broader focus than strictly criminal justice, as its responsibilities can extend to various policy-making or regulatory functions rather than direct involvement in the administration of justice at the local or state level.