U.S.: Chemicals that can be used to make fentanyl were shipped to Tucson by Chinese companies
Federal authorities say they tracked more than a half-ton of chemicals that can be used to make the deadly opioid fentanyl to Texas and Tucson.The effort helped lead to indictments against Chinese companies and employees revealed on Tuesday by the U.S. attorney general.Homeland Security Investigations used phone numbers linked to chemical shipments to identify bitcoin wallets