An excellent reference work on philosophy. The Stanford Encyclopedia of Philosophy organizes scholars from around the world in philosophy and related disciplines to create and maintain an up-to-date reference work.
Bureau of Justice Statistics (BJS): Quick access to a variety of data including crimes and victims, criminal offenders, law enforcement, courts and sentencing, prosecution, corrections, federal justice, expenditures and employment, etc.
Data.gov: access to government datasets for your own analysis Statistical Abstract of the United States
Global Report in Crime and Justice: Includes data that have been collected by the United Nations and ancillary bodies concerning crime, criminal justice and crime prevention over the past 25 years.