The investigation began years ago after two drug dealers got into a car accident in a small Tennessee town. What followed was a series of secret wiretaps, a shootout with police and the discovery of drugs hidden in a tractor trailer that would eventually lead federal investigators back to cartel leaders in Mexico.

In 2019, two drug dealers got into a car accident in Rockwood. Six years later, investigations revealed how Mexican cartels were trafficking drugs to U.S. towns.