Here we go again

Now we know where Mexican drug cartels are getting their guns:

The Bureau of Alcohol, Tobacco, Firearms and Explosives says Washington is the No. 4 source of illegal guns in Mexico.

And we thought the 90% canard was done with ......

I for one want to see how they can deduce that the guns actually came from Washington state, as opposed to having initially been sold in Washington state.

pm