Whistleblowers: DEA attorneys went easy on McKesson, the country's largest drug distributor January 4, 2018 DEA, McKesson, Public Health 0 In 2014, after two years of painstaking inquiry by nine DEA field divisions and 12 U.S. Attorneys, investigators built a powerful case against McKesson for the company's role in the opioid crisis. Read More... Comments are closed.