Cartels smuggle U.S. drug money back to Mexico in cash, study finds

Reporting from Mexico City — More than half of the “breathtaking” sums of money earned by Mexican drug cartels in the U.S. and smuggled into this country dissolves into Mexico’s cash-based economy, eluding detection and funding vast criminal operations, according to a new U.S.-Mexican government study released Wednesday.

http://articles.latimes.com/2010/jun/03/world/la-fg-mexico-cash-20100603