What distinguished Ashlyn as one of the region’s top mules, according to the prosecutor who sent her to prison, wasn’t just the volume of drugs she was transporting; it was also her body’s astonishing ability to metabolize the drug without overdosing. (“Generally speaking, there are people who overdose all the time, then there are people like me who have never overdosed,” she told me.) At the peak of her addiction, Ashlyn was using fifty to sixty bags a day. “She had a remarkable liver,” her prosecutor said.