"Almost half of the 195,809 federally sentenced individuals in the Bureau of Prisons are serving time for drug trafficking offenses, but little is known about their criminal histories or the nature of their offenses. This brief examines both, finding that many people in federal prison for drug crimes have minimal or no criminal histories, and most were not convicted of violent or leading roles. Nonetheless, many serve long prison sentences due to mandatory minimum sentencing laws. Lasting reductions in the size of the federal prison population will require big cuts in length of stay for drug offenses" (home page). Sections of this brief cover: many drug offenders housed in federal prisons have little to no criminal histories; few are convicted of leading trafficking organizations or responsible for violent acts during drug trafficking crimes; long federal sentences are driven by mandatory minimums; and continued federal prison population reductions require shorter drug sentences.