United States Attorney Alison J. Ramsdell announced that Clarence Williams, also known as “CJ,” from Lancaster, California, has been sentenced by Chief Judge Roberto A. Lange to 21 years and 10 months in federal prison. Williams was convicted of conspiracy to distribute methamphetamine and fentanyl in the Sioux Falls area.
Williams, aged 34, will also face five years of supervised release following his prison term and is required to pay a $100 special assessment to the Federal Crime Victims Fund. He was indicted by a federal grand jury in September 2024 and pleaded guilty on March 5, 2025.
The investigation revealed that Williams traveled from California to Sioux Falls with the intent to sell methamphetamine and fentanyl. He collaborated with individuals from both California and South Dakota, utilizing vehicles and the postal system for distribution. Authorities seized approximately two kilograms of fentanyl pills or powder during the investigation through intercepted parcels and search warrants conducted at a residence in Sioux Falls. Additionally, multiple pounds of methamphetamine were trafficked by the group.
U.S. Attorney Ramsdell stated, “This case is yet another example of the tremendous collaboration taking place between federal, state, and local law enforcement agencies to dismantle drug trafficking organizations in South Dakota.” She added that Williams would spend over two decades in prison for exploiting drug addictions for financial gain.
Rafael Mattei, Acting Special Agent in Charge of the DEA Omaha Division said: “Those attempting to harm members of our South Dakota communities by pushing poisons like fentanyl and methamphetamine should take note of this sentencing.”
The investigation was conducted by the DEA, United States Postal Inspection Service, and Sioux Falls Area Drug Task Force. Assistant U.S. Attorney Mark Hodges prosecuted the case. Following his sentencing, Williams was taken into custody by the U.S. Marshals Service.


