Stockton Man Sentenced to 10 Years in Prison for Heroin and Fentanyl Trafficking

SACRAMENTO, Calif. — Frank Jonathan Guzman, 31, of Stockton, was sentenced Tuesday to 10 years in prison for conspiracy to distribute heroin and fentanyl and possession with intent to distribute heroin and fentanyl, U.S. Attorney Phillip A. Talbert announced.

According to court documents, between November 2018 and December 2019, Guzman and co‑defendant Jose Cruz Ivan Aispuro, 38, of Stockton, conspired to distribute and possess with intent to distribute at least 1 kilogram of heroin and at least 400 grams of counterfeit pharmaceutical pills containing fentanyl. As part of this conspiracy, on three occasions Guzman sold heroin to an undercover agent and another person and also sold 500 counterfeit oxycodone pills containing fentanyl to the undercover agent. Agents executed a search warrant at Guzman’s residence in Stockton and seized approximately 10,000 counterfeit oxycodone pills containing fentanyl and 2.8 kilograms of heroin.

This case is the product of an investigation by the Drug Enforcement Administration with assistance from the U.S. Marshals Service and the San Joaquin Metropolitan Drug Task Force. Assistant U.S. Attorney David W. Spencer is prosecuting the case.

On Sept. 26, 2023, Aispuro pleaded guilty to conspiracy to distribute heroin and fentanyl and distribution of fentanyl. Aispuro is scheduled to be sentenced by U.S. District Judge John A. Mendez on Jan. 9, 2024.

The case was investigated under the Organized Crime Drug Enforcement Task Forces (OCDETF). OCDETF identifies, disrupts, and dismantles the highest-level criminal organizations that threaten the United States using a prosecutor-led, intelligence-driven, multi-agency approach. For more information about Organized Crime Drug Enforcement Task Forces, please visit Justice.gov/OCDETF.