April 24th, 2016 
The following are highlights from a DEA report entitled The Pablo Acosta Organization, a report based primarily on investigations carried out by U.S. Customs Service agents in the Presidio, Texas, area:
There has been a continuous increase in the trafficking of Mexican heroin, cocaine, and marijuana into the United States from Mexico over the last few years. Many fields of opium poppies were found and destroyed in Coahuila and Chihuahua in 1984. However, the production of opium is expected to rise in 1985. Mexican opium is converted directly into heroin in Mexico and is usually smuggled across the southern border.
There has also been a noticeable increase in the smuggling of cocaine through Mexico, with significant quantities of cocaine produced in South America crossing the southwest border, and although the largest worldwide marijuana seizure to date occurred in the state of Chihuahua in November 1984, it is believed that there are major quantities still available. The amount of marijuana seized along the U.S.-Mexico border has more than tripled in the last year. Recent seizures of very high-grade marijuana tops suggests the existence of very large stockpiles still in Mexico. Read more »