What he said then and what he says now...

Tom Diaz during the Congressional hearings on Mexico, calling for stricter regulation of US firearms:

US and Mexican officials report that, based on ATF tracing data, the cartels get between 90 percent and 95 percent of their firearms from the United States.

Yet when that number is revealed to a complete fabrication his tune changes:

But Tom Diaz, senior policy analyst at the Violence Policy Center, called the "90 percent" issue a red herring and said that it should not detract from the effort to stop gun trafficking into Mexico.

So it went from "US is supplying guns so we need to tighten the laws" to "It doesn't matter where the guns come from, we need to tighten the laws".

There is no integrity in the gun control movement.