Lisa Xing, 36, and Zhanwen Song, 38, were charged in a superseding federal indictment in the Eastern District of Texas with drug trafficking and money laundering offenses tied to an alleged scheme that supplied from China for distribution in U.S. correctional facilities.
"This FBI and our Homeland Security Task Force partners will keep finding and disrupting these networks wherever they operate," Patel wrote. "Great work by @FBIDallas and our law enforcement partners. "
EXCLUSIVE: FENTANYL DEATHS PLUNGE 22% AS TRUMP WHITE HOUSE TOUTS CRACKDOWN ON DEADLY DRUG CRISIS
According to prosecutors, Xing and Song shipped synthetic drugs to co-defendants Adell Willis of Texas and Judy Ly of Michigan, who allegedly dissolved the drugs into liquid, soaked sheets of paper in the mixture and mailed them to inmates in across the country.
Willis and Ly were indicted in May on charges including conspiracy to distribute controlled substances and conspiracy to commit money laundering.

The said China's Ministry of Public Security arrested Xing, Song and 19 additional alleged co-conspirators, seized 475 kilograms of synthetic cannabinoids and shut down four illicit manufacturing sites. Officials said the investigation was coordinated through an FBI-Chinese Ministry of Public Security counternarcotics working group established earlier this year.
If convicted, each defendant faces a mandatory minimum sentence of 10 years in prison and up to life behind bars.
