Creating Trauma-Focused Care in Juvenile Secure Detention will establish trauma-informed mental health screening in New York City (NYC)’s two secure juvenile detention centers. The program will establish evidence-based skills groups to help reduce trauma-related problems, and will build collaborative partnerships in the child-serving systems associated with juvenile detention to increase trauma responsiveness in those systems. Goals include: 1) establish systematic trauma-informed mental health screening, evaluate that process, and develop and disseminate a product through the NCTSN network; 2) adapt the STAIR-A skill-building group protocol for use in juvenile detention by juvenile detention center staff and mental health clinicians and evaluate the approach; 3) infuse into NYC secure juvenile detention an awareness of trauma and a common language and methodology for handling trauma-related emotional and behavioral issues and evaluate this approach; and 4) build a collaborative partnership among major youth-serving systems that interact directly with NYC juvenile detention centers (e.g., probation, family courts, agencies providing non-secure detention) and extend trauma knowledge and trauma-informed care into those systems. During the four- year project, assuming admissions to the facilities remain at current levels, we expect that 3,256 unduplicated residents will be screened. Using a train-the-trainer model, we will train 30 co-trainers from within the facilities, and deliver the NCTSN-developed Think Trauma training curriculum to 350 juvenile justice staff. After all secure detention staff are trained, we will provide yearly trauma-informed booster training sessions at each site. Over the course of the project, we will train 75 juvenile justice direct care staff as STAIR-A group leaders within their facilities, and, assuming admissions to the facilities remain at current levels, 1,512 residents will participate in STAIR-A groups. Residents will reinforce the skills they learn in STAIR-A groups through participation in skills practice sessions on their residential halls, and selected residents will publicize and encourage practice of STAIR-A skills through participation in a youth leadership group.