MEXICO CITY (AP) — Prosecutors revealed in a recent indictment that while Sinaloa cartel boss Joaquín “El Chapo” Guzmán serves a life sentence, his sons have steered the family business into fentanyl, establishing a network of labs churning out massive quantities of the cheap, deadly drug that they smuggle into the U.S. The indictment unsealed April 14 in Manhattan details a generational shift. The cartel went from its first makeshift fentanyl lab to a network of labs concentrated in the northern state of Sinaloa in less than a decade. A single cartel “cook” can press fentanyl into 100,000 counterfeit pills every day to fool Americans into thinking they’re taking Xanax, Percocet or oxycodone.