This September 1, 2019 article from the Los Angeles Times, gives an indepth look at the how the heroin business in Mexico, was put out of business by a new breed of drug manufacturer. How once cattle farmers are now Fentanyl cooks, churning out pounds of the drug from labs in their backyard. The Times quotes the CDC in saying,
Last year, more than 31,000 people in the United States died after taking fentanyl or one of its close chemical relatives, according to the U.S. Centers for Disease Control and Prevention. No other drug in modern history has killed more people in a year.