The Annie E. Casey Foundation surveyed prison populations and found that the youth detention population fell 24% in one month. They note:

The percentage reduction in youth detention across these jurisdictions in one month was as large as the national decline over a recent seven-year period (from 2010 to 2017).

The findings highlight the rapid changes occurring with the judicial system during the COVID-19 pandemic.

Learn more about the survey and the data here: https://www.aecf.org/blog/survey-amid-pandemic-youth-detention-population-fell-24-in-one-month-matchi/