What the Sackler family knew about OxyContin's abuse risks

The U.S. opioid epidemic has taken hundreds of thousands of lives. A reckoning for the manufacturers, marketers and distributors of these drugs has now begun -- but despite several multibillion dollar settlements, some states and municipalities say accountability and transparency for the companies is lacking. Casey Ross of STAT News joins Amna Nawaz to discuss Purdue Pharma and the Sackler family.