McKinsey reportedly under US criminal investigation over opioid industry work

Federal prosecutors looking at relationship with Purdue Pharma and other drug manufacturers, and its role in US opioid crisis

McKinsey is under criminal investigation in the United States over allegations that the consulting firm played a key role in fueling the opioid epidemic, with federal prosecutors homing in on its work advising OxyContin maker Purdue Pharma and other drugmakers, three people familiar with the matter said.

The consulting firm and the US justice department declined to comment.