A longitudinal study of over 1,800 individuals shows that 64% of males and 35% of females who had a psychiatric disorder when they were in juvenile detention still had a disorder 15 years later. Among all participants, 52% of males and 31% of females had a psychiatric disorder as adults – much higher than the average U.S. adult population. Participants were interviewed up to 12 times between 1995 and 2015 to assess mental health symptoms over time. The findings further emphasize the need to address mental health conditions among youth in the justice system, reducing barriers to successful transition to adulthood. For more information, see the study in JAMA.