Oct. 3, 2018-Madison Cross, 22, traveled from her home outside Columbus, Ohio, last Oct. 7 to check into Serenity Care Center, a state-licensed drug detoxification center in suburban Phoenix. Her family said she wanted to kick her addiction to opioids and other drugs for her 2-year-old daughter. Once at the center, she showed escalating signs of distress. She had trouble breathing. Her pulse raced. She was wheezing, and her lungs sounded “crackly,” staff members told investigators.