Cody Kinzie Dittmar, Fentanyl and Heroin Sales, Iowa 2026

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Fentanyl and Heroin Sales Land Iowa Man 37-Year Prison Sentence

A convicted federal felon who sold fentanyl and heroin that resulted in two overdose deaths in 2023 has been sentenced to a total of 37 years in federal prison.

Cody Kinzie Dittmar, age 34, originally from Dubuque, Iowa, received the prison term after a June 25, 2025, jury verdict finding him guilty of distributing and conspiring to distribute heroin and fentanyl, resulting in two deaths.

Dittmar was sentenced in Cedar Rapids by United States District Court Chief Judge C.J. Williams on March 3, 2026. He was sentenced to 420 months’ imprisonment and must also serve a three-year term of supervised release after the prison term. Dittmar was serving a term of supervised release on his 2017 case at the time he committed the crimes that led to his convictions in 2025.

Court records show that Dittmar was sentenced to 64 months in federal prison for a 2017 conviction for being a felon in possession of a firearm. The evidence at trial showed that Dittmar was released to federal supervised release in June 2023 and immediately began selling heroin and fentanyl with his girlfriend, then wife, Alysha (Gould) Dittmar.

On July 1, 2023, the Dittmars sold a mixture of heroin, fentanyl, and xylazine to a customer in Marion, Iowa. The customer and his wife used the drugs shortly thereafter. Both then died of overdoses. The Dittmars continued to sell heroin and fentanyl in the Cedar Rapids area until July 2024.

Alysha Dittmar previously pled guilty to distribution of heroin and fentanyl resulting in the two deaths. There is no parole in the federal system. Dittmar is being held in the United States Marshal’s custody until he can be transported to a federal prison.

The case was investigated by the Marion Police Department and the Drug Enforcement Administration (DEA) Task Force consisting of the DEA; the Linn County Sheriff’s Office; the Cedar Rapids Police Department; the Marion Police Department; and the Iowa Division of Narcotics Enforcement and was prosecuted by Assistant United States Attorneys Nicole Nagin and Dan Chatham.

The case file number is 25‑CR‑00001‑CJW‑MAR.

Court file information is available online.