A look at guns recovered by police reveals patterns in the movements of weapons between states.
Crime gun imports and exports by state, 2009
Firearms recovered by police investigating crimes show states with strong gun laws import from states with weaker laws.
By Wilson Andrews and David S. Fallis - The Washington Post, October 26, 2010.
SOURCE: Raw data from the Bureau of Alcohol, Tobacco, Firearms and Explosives, provided by Mayors Against Illegal Guns.
ATF tracing center
When police recover a gun from a crime scene and want to find out the last known owner they send a request to the ATF's National Tracing Center in Martinsburg, W. Va.
By Ben de la Cruz, James V. Grimaldi and Sari Horwitz - The Washington Post, October 26, 2010.
