U.S. has been quietly helping Mexico with new, high-tech ways to fight opium

The Drug Enforcement Administration said in a report last year that Mexico supplies 93 percent of all heroin consumed in the United States
The Washington Post (US)
Sunday, April 15, 2018

In the past few opiate-soaked years, U.S. officials say, nearly all the heroin coursing through American cities has come from one place: Mexico. “There are still a lot of question marks around the figures,” said Martin Jelsma, director of the drug program at the Transnational Institute, a research organization based in Amsterdam, and the co-author of a forthcoming study on Mexican and Colombian poppy production. Equally challenging, Jelsma said, is identifying the source country of a heroin sample. He doubts that the DEA can always tell whether heroin is made from Mexican or Colombian poppy, given that Mexican drug traffickers in some cases have hired Colombians to teach heroin-production techniques, so the product is similar.