Feds employ data-driven early warning system in opioid fight

The pain clinic tucked into the corner of a low-slung suburban strip mall was an open secret.Patients would travel hundreds of miles to see Dr. Andrzej Zielke, eager for what authorities described as a steady flow of prescriptions for the kinds of powerful painkillers that ushered the nation into its worst drug crisis in history.At least one of Zielke's patients died of an overdose, and prosecutors say others became so dependent on oxycodone and other opioids they would crowd his office, sometim