When it was first introduced, the Youth Criminal Justice Act (YCJA) had two primary goals of reducing the reliance on custody and increasing uniformity in sentencing practices. Twenty years later, the YCJA has succeeded in dramatically lowering overall rates of youth in custody, but this gain has been selectively experienced by non-Indigenous youth and regional disparities in sentencing practices persist. In this paper, we suggest that the YCJA’s inability to meet its goals is due to overcriminalization by over depth. Using Indigenous youth sentencing as a case study, we argue the YCJA’s layered and sometimes conflicting principles have symptoms of overcriminalization by over depth, including over- and under-inclusiveness, arbitrariness, and confusion in implementation. To more effectively meet the YCJA’s initial goals, we propose legislative streamlining and systemic reforms, including specialized Indigenous youth courts and enhanced community-based resources, as pathways to greater justice.