The decision to release or detain a defendant pretrial represents a crucial “pivot point” within the criminal justice process. Defendants facing pretrial incarceration are beset with consequences that include the curtailment of their personal liberties and loss of employment, residence, and parental rights. Pretrial detention can also have negative implications for pretrial outcomes and case outcomes. The authors provide a general overview of actuarial pretrial assessments and their implementation in criminal court systems and highlight the characteristics of pretrial conditions and interventions related to monitoring, treatment, and supervision, as well as their efficacy.