SIOUX FALLS - United States Attorney Ron Parsons announced today that U.S. District Judge Karen E. Schreier has sentenced a man from California City, California, convicted of Conspiracy to Distribute a Controlled Substance. The sentencing took place on January 5, 2026.Alonzo Green, 43, was sentenced to 20 years in federal prison, followed by five years of supervised release, and ordered to pay a $100 special assessment to the Federal Crime Victims Fund.Green was indicted for Conspiracy to Distribute a Controlled Substance by a federal grand jury in October 2024.
He pleaded guilty on October 8, 2025.Green was a member of a California-based drug trafficking organization which began operating in the Sioux Falls area in the Fall of 2023. The group sourced large quantities of narcotics, including methamphetamine and fentanyl, from California, and then used short-term rental properties as bases of operation to distribute the drugs in and around Sioux Falls. As a member of the group, Green directed multiple shipments of drugs through the mail and assisted in driving loads of drugs from California to South Dakota. He was arrested while transporting one such load on September 17, 2024.
Green and a co-conspirator were stopped by the South Dakota Highway Patrol while traveling through the Hot Springs area. DEA agents on site obtained a search warrant and found packages containing over 4,900 grams of methamphetamine and 925 grams of powder fentanyl in Green’s vehicle.“This was a tremendous arrest resulting in an appropriate prison sentence that has significantly disrupted the activities of this California-based drug trafficking organization in South Dakota,” said U.S. Attorney Parsons. “Impressive work all around by these dedicated law enforcement officers.”This case was investigated by the DEA, the U.S.
Postal Inspection Service, South Dakota Highway Patrol, and the Sioux Falls Area Drug Task Force. Assistant U.S. Attorney Mark Joyce prosecuted the case.Green was immediately remanded to the custody of the U.S. Marshals Service.