Juvenile-justice-involved youth are known to have higher rates of traumatic exposure and traumatic stress symptoms, which increases the necessity for appropriate treatment and targeted case planning for these youth. Traumatic stress symptoms have been shown as a risk factor for delinquent behaviors, though practices for treating juvenile-justice-involved youth who have traumatic stress symptoms is limited. Evidence-based practice dissemination has focused on the use of trauma-focused treatment in residential and community settings. Juvenile-justice-involved youth can be most vulnerable in the secure detention setting. Youth in detention face ongoing stressors in the secure setting, having to witness interpersonal violence by peers, being subject to physical restraints, and attempting to cope in a setting with limited choices. Best practices for the juvenile detention setting are even more limited, despite knowledge of the efficacy of evidence-based trauma interventions in reducing trauma symptoms and restoring healthy family dynamics and relationships that trauma disrupts. This practice note discusses the implementation of trauma-focused cognitive– behavioral therapy in the detention setting, and the interventions flexibility, appropriateness, and impact for youth in detention. (PsycINFO Database Record (c) 2018 APA, all rights reserved)