Sunlight Foundation's searchable repository of publicly available criminal justice datasets and research from all states, the District of Columbia, and the federal government.
FBI site that makes available statistics on violent crime (murder and nonnegligent manslaughter, forcible rape, robbery, and aggravated assault) and property crime (burglary, larceny-theft, and motor vehicle theft). Arson is not included on the site. Provides a table-building tool. Note their instructions for the proper use of the statistics.
Contains data supplied by the Federal Bureau of Investigation from approximately 17,000 law enforcement agencies in the United States. Access national, state, county and city data. Use their table-building tool to display the data that aligns with your interests.
Partnership between the University at Albany Libraries and the Capital Punishment Research Initiative (CPRI) at the University's School of Criminal Justice. Includes records from M. Watt Espy whose papers led to the creation of the Espy File capital punishment database.