FBI Uniform Crime Report
http://www.fbi.gov/ucr/ucr.htm

gunpolicy.org
http://www.gunpolicy.org

Harvard Injury Control Research Center
http://www.hsph.harvard.edu/research/hicrc/

National Violent Death Reporting System
http://www.cdc.gov/ncipc/profiles/nvdrs/default.htm

Web-based Injury Statistics Query and Reporting System
http://www.cdc.gov/ncipc/wisqars/default.htm