Includes Congressional Record 1789-2001, Congressional Hearings 1824-2003, Congressional Serial Set, Committee Prints 1830-present, CRS Reports 1916-present, Executive Branch Documents 1789-1932, and U.S. Bills and Resolutions.
The publications page for the DOJ has links to various other resources including those from the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) and the Drug Enforcement Administration (DEA).
Lots of information and reports, with links to downloadable data at the National Archive of Criminal Justice Data at ICPSR. Data in spreadsheet (wk1) format is available directly on the site.