Describes the annual activity, workloads, and outcomes associated with the federal criminal justice system from arrest to imprisonment, using data from the U.S. Marshals Service (USMS), Drug Enforcement Administration (DEA), Executive Office for U.S. Attorneys (EOUSA), Administrative Office of the U.S. Courts (AOUSC), and Federal Bureau of Prisons (BOP). Tables and text describe arrests and investigations by law enforcement agency and growth rates by type of offense and federal judicial district. This report examines trends in drug arrests by the DEA. It also provides the number of offenders returning to federal prison within 3 years of release and includes the most recently available data on sentences imposed and their lengths by type of offense. See also Federal Justice Statistics, 2011 - Statistical Tables and Federal Justice Statistics, 201112.