'In response to concerns around the unique needs of younger adult offenders, this report examines the profiles of young adult federal offenders in relation to their older counter-parts, considering factors related to demographics, sentence information, and risk/need. Comparative analysis was undertaken by drawing on three distinct sources of data; an in-custody snapshot of the federal custodial population, an offender admissions cohort, and an offender release cohort. Age groups used in analyses included the following categories: 18 to 21; 22 to 25; 26 to 30; and over 30'--Executive summary, page iii.