To combat an escalating opioid epidemic, the Drug Enforcement Administration trained its sights in 2011 on Mallinckrodt Pharmaceuticals, one of the nation's largest manufacturers of the highly addictive generic painkiller oxycodone. It was the first time the DEA had targeted a manufacturer of opioids for alleged violations of laws designed to prevent diversion of legal narcotics to the black market. Ultimately, the DEA and federal prosecutors would contend that the company ignored its responsibility to report suspicious orders as 500 million of its pills ended up in Florida between 2008 and 2012. Investigators alleged in internal documents that the company's lack of due diligence could have resulted in nearly 44,000 federal violations and exposed it to $2.3 billion in fines. But six years later ... the government has taken no legal action against Mallinckrodt. Instead, the company has reached a tentative settlement. Under the proposal, which remains confidential, Mallinckrodt would agree to pay a $35 million fine and admit no wrongdoing. Mallinckrodt's response was that 'everyone knew what was going on in Florida but they had no duty to report it,'" according to an internal summary of the case prepared by federal prosecutors. The Post reported in October that the DEA's civil and administrative enforcement efforts against the mammoth wholesale distributors that deliver painkillers to pharmacies stalled in the face of a stepped-up lobbying campaign by the drug industry.