The potent opioid fentanyl, which is worsening a deadly U.S. drug epidemic, is pouring into the country from an array of sources and presenting law enforcement with complex challenges, according to new information from the nation’s drug czar. A detailed letter to U.S. House lawmakers, responding to a request from the Energy and Commerce Committee, laid out many details about how authorities believe traffickers are moving and selling...

Source: Wall Street Journal March 31, 2017 23:03 UTC