In a letter to ATF acting Director Kenneth Melson, Iowa Senator Chuck Grassley explained why detailed research of ATF data proves that a majority of Mexican drug cartel guns do not come from American gun stores. Further, there’s evidence Fast and Furious was a premeditated criminal operation demanding prosecution.

Some points by Senator Grassley:

ATF trace data proves that the majority of firearms did not come from American gun stores: “of those firearms actually submitted for tracing, a vast majority of those firearms did not come from FFLs …” Instead, American-made firearms were sold to “foreign countries or militaries requiring approval of the State Department and Homeland Security.”

The “70% of cartel guns are American” allegation includes “nearly 2,000 firearms as part of ATF’s Fast and Furious Investigation, where the ATF knowingly authorized firearm sales to straw purchasers before the weapons were trafficked to Mexican DTOs [Drug Trafficking Organizations].”

Said Grassley: “I understand that agents working on tracing weapons in Mexico back to the U.S. routinely instruct GOM [Government of Mexico] authorities to only submit weapons for tracing that have a likelihood of tracing back to the U.S.” Building on the sampling bias I noted earlier, this implies that the American and Mexican governments intentionally conspired to manufacture a crisis.

One last coffin nail by Grassley: “Data indicates that the top source dealer for illegal firearms traced in Mexico for 2009 was “Direccion General De Industria Milita” or the Directorate General of Military Industry in Mexico.”

In other words, the biggest source of cartel guns was the Mexican government itself.