historical violence database
- Chicago
- Florida
- Illinois - Williamson County (pdf)
- Los Angeles
- Maryland - Frederick County
- New Orleans
- New York - Herkimer County (pdf)
- New York City
- Ohio - Holmes and Ross counties
- Philadelphia
- San Francisco
- South Carolina - Charleston
- Trans-Mississippi West: Arizona, California, Colorado, Kansas, and Nebraska
- Uniform Crime Reports of the Federal Bureau of Investigation