Purdue Pharma, maker of the highly addictive OxyContin, is keeping secret the results of an investigation of the Sacklers. Critics want the findings made public.

STAMFORD, CT – APRIL 2: Purdue Pharma headquarters stands in downtown Stamford, April 2, 2019 in Stamford, Connecticut. Purdue Pharma, the maker of OxyContin, and its owners, the Sackler family, are facing hundreds of lawsuits across the country for the company’s alleged role in the opioid epidemic that has killed more than 200,000 Americans over the past 20 years. (Photo by Drew Angerer/Getty Images)