Bill Whitaker:

problem as this is, it’s also not a whodunit. We know who’s responsible. It’s the Sinaloa Cartel and the Jalisco Cartel that are based in Mexico. They dominate and control the entire global fentanyl supply chain, starting in China, going to Mexico, coming into the United States.

Milgram told us this crisis began 10 years ago… when the cartels started to wrestle control of the supply chain from China and began making fentanyl in clandestine labs in Mexico.

Bill Whitaker: So these two drug cartels from our neighbor, from Mexico, are responsible for almost 70,000 American deaths a year?

Anne Milgram: Yes.